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after与in的用法区别
(1)after 与 in 的用法区别均可与一段时间连用， after 表示以过去时间为起点的一段时间以 后，因此通常与过去时连用；而 in 则表示从现在算起的一段时间以 后，因此通常用于将来时或含有将来意义的句子。如： He came back after three days. 3 天后他回来了。 I’ll come back
in three days. 我 3 天后回来。 I think he can come back in three days. 我想他 3 天后可以回来。 可与时间点连用，此时则可用于将来时 after 除与时间段连用外，还可与时间点 可与时间点 可用于将来时 (但是 in 不能与时间点连用 不能与时间点连用)： He will arrive after five o’clock. 他 5 点钟以后到。都可用于表示时间的名词前，但用法各不相同， (2)介词 in,on 与 at 都可用于表示时间的名词前，但用法各不相同，区别在于： 其区别一、用 in 的场合 （1）表示“在某年/月/季节”这个含义时，须用介词 in。例如： She came to this city in 1980.他于 1980 年来到这个城市。 It often rains here in summer.夏天这里常常下雨。 （2）表示“从现在起一段时间以后”时，须用介词 in。例如： They will go to see you in a week.他们将在一周后去看望你。 I will be back in a month.我将在一个月后回来。 （3）表示“在某世纪”时，须用介词 in.例如: This machine was invented in the eighteenth century.这台机器是 在 18 世纪发明的. Great changes took place in the twentieth century.20 世纪发生了 巨大变化. （4）表示“在某年代或特定世纪某年代”时，须用介词 in。例如： This incident happened in the 1970''''s.该事件发生在 20 世纪 70 年代。 The Anti-Japanese War broke out in the 1930''''s.抗日战争爆发于 20 世纪 30 年代。 除此之外，morning / evening / afternoon 三个词也常跟介词 in 连用。 例如： Don't watch TV too much in the evening.晚上看电视不要太多。 They sometimes play games in the afternoon.他们有时在下午做游戏。1二、用 on 的场合 （1）表示“在具体的某一天”或“ （在具体的某一天的）早上、中午、晚 上”等，须用介词 on。例如： Jack was born on May 10th,1982.杰克生于 1982 年 5 月 10 日。 They left on a rainy morning.他们是在一个雨天的早上离开的。 He went back to America on a summer afternoon.他于一个夏天的下 午返回了美国。 （2）表示“在星期几”或“在星期几的早上、中午、晚上”等，须用介词 on。例如： We don't go to school on Saturday and Sunday.我们星期六和星期天 不上学。 What time do you get up on weekdays?你在平日什么时候起床？ I heard this story on Saturday morning.我是在星期六的早晨听到这个 故事的。 （3）表示“在某一节日”时，须用介词 on。例如： We usually eat mooncakes on Mid-autumn Festival.我们通常在中秋节 吃月饼。 Mr Hu received a card on Teachers''''Day.胡老师在教师节那天收到 了一张卡片。 注意：当 morning,evening,afternoon 被 of 短语修饰，习惯上用 in,而 不用 on.例如： in the early morning of September 10th 在 9 月 10 的清晨； the late in afternoon of September 12th 在 9 月 12 日的傍晚。 三、用 at 的场合 （1）表示“某一具体时刻（即几点几分时），须用介词 at。例如： ” He gets up at six o''''clock every day .他每天六点起床。 I got home at five thirty yesterday afternoon.我昨天下午五点半 到家。 （2）用在特定的时候（时节、时机）时，须用介词 at。例如： They were happy at that time.他们那时很幸福。 I think the shop is clcsed at this time of day.我认为商店在白天 的这个时候关门了。 （3）表示“在中午、在夜晚、在周末”时，须用介词 at。例如： What do you often do at noon?你中午经常做些什么？ You can see many stars in the sky at night.夜晚你能看到天空中有 许多星星。 （4）表示“在……岁”时，须用介词 at。例如： At the age of nine ,the boy could swim well.在九岁的时候，这孩子 就游泳游得很好了。 At the age of twenty,I began to teach English at this school.在 二十岁的时候，我就开始在这所学校教英语了。 注意：在含有 next ,last,this,one ,any, each, every , some, all 的 词 组 和 tomorrow,yesterday, the day after tomorrow, the day before yesterday 前不用任何介词。例如：2What did you do last summer holidays?去年暑假你做了些什么？ What are you going to do the day after tomorrow?后天你打算做什么? 早、午、晚要用 in，at 黎明、午夜、点与分。 年、月、年月、季节、周，阳光、灯、影、衣、冒 in。 将来时态 in...以后，小处 at 大处 in。 有形 with 无形 by，语言、单位、材料 in。 特征、方面与方式，心情成语惯用 in。 介词 at 和 to 表方向，攻击、位置、恶、善分。 日子、日期、年月日，星期加上早、午、晚， 收音、农场、值日 on，关于、基础、靠、著论。 着、罢、出售、偷、公、假，故意、支付、相反，准。 特定时日和“一……就”，on 后常接动名词。 年、月、日加早、午、晚，of 之前 on 代 in。 步行、驴、马、玩笑 on，cab，carriage 则用 in。 at 山脚、门口、在当前，速、温、日落、价、核心。 早、午、晚要用 in in the evening 在晚上 in the day 在白天 例： in the afternoon 在下午 in the morning 在早上 at 黎明、午、夜、点与分 例 at dawn at daybreak 在黎明时候 at night 在夜间 at noon 在中午 at midnight 在午夜 以上短语都不用冠词 at nine o'clock 在 9 点钟 at 8：30 seven thirty 在 8 点半 at half past ten 在 10 点半 at nine fifteen 在 9 点 15 分 at ten thirty a.m. 在上午 10 点 30 分 也可以写成 seven to five 5 点差 7 分半小时以上 five minutes after two 2 点过 5 分 at the weekend 在周末 at a quarter to two 1 点 45 分 年、月、年月、季节、周 即在“来年”，在“某月”，在“某年某月” 但在某年某月某日则用 on ，在四季，在 第几周等都要用 in。 例：in 1989 在 1989 年 in 1927 在 1927 年 in March 在三月 in April 在四月 in December 1986 在 1986 年 12 月3in July l984 在 1984 年 7 月 in the first week of this semester 这学期的 第一周 in the third week 在第三周 in spring 在春季 in summer 在夏季 in autumn 在秋季 in winter 在冬季 阳光、灯、影、衣、冒 in 即在阳光下，在灯下，在树阴下，穿衣、着装、冒雨等都要用 in。 例：Don't write in dim light.切勿在暗淡的灯光 下写字。 They are reviewing their lessons in the bright light.他们在明亮的灯光下复习功课。 They are playing in the shade of a tree. 他们坐在树阴下玩耍。 a prisoner in irons 带着镣铐的囚犯 He went in the rain to meet me at the station. 他冒雨到车站去接我。 The poor in rags in old society. 旧社会穷 人们衣衫褴褛. 以及：in the bright sunlight 在明亮的阳光下 a merchant in disguise 乔装的商人 the woman in white black red yellow 穿着白黑、红、黄 色衣服的妇女 in uniform 穿着制服 in mourning 穿着丧服 in red shoes 穿着红色鞋 in his shirt sleeves 穿着衬衫 将来时态 in...以后 例 They will come back in 10 days. 他们将 10 天以后回来。 I'll come round in a day or two. 我一两天就回来。 We'll be back in no time. 我们一会儿就回来。 Come and see me in three days' time. 三天后来看我。从现在开始 after... 从过去开始 小处 at 大处 in 例： and I arrived at Heishan county safe and sound all is well. Don't worry. 李和我 Li 平安地到达黑山县，一切很好，勿念。 I live in a great city big city my sister lives at a small town while my parents live at a village. 我住在大城市，我姐姐住在一个小城镇，而我的父母则住在农村。 I'm in Liaoning at Ashcan. 我住在辽宁省鞍山市.4有形 with 无形 by，语言 、单位、材料 in 例：The workers are paving a road with stone. 工人们正用石子铺路。有形 The teacher is correcting the paper with a new pen. 这位教师正用一支新笔批改论 文。有形 〃Taking Tiger Mountain by Strategy〃 is a good opera. 《智取威虎山》是一出好 戏。无形 The product is separated by distillation into gasoline and gas oil. 这种产品是用蒸馏 分离出气油和粗柴油。 表示方式、手段、方法，无形 I really can't express my idea in English freely indeed. 我确实不能用英语流利地表 达我的思想。 表示某种语言用 in I wrote a novel in Russian. 我用俄语写了一本小说。同上 The kilometer is the biggest unit of length in the metric system. 公里是米制中最长 的长度单位。 表示度、量、衡单位的用 in The length is measured in meter kilometer and centimeter. 长度是以米、公里、厘米 为单位来计算的。同上 This board was cast in bronze not in silver . 这个牌匾是铜铸的，不是银制的。 特征、方面与方式、心情、成语惯用 in 特征或状态： 例 They found the patient in a coma. 他们发现病人处于昏迷状态。 The Democratic Party was then in power. 那时民主党执政。 He has not been in good health for some years. 他几年来身体一直不好。 Many who came in despair went away in hope. 许多人带着绝望情绪而来，却满怀 希望而去。 The house was in ruins. 这房屋成了废墟。 The poor girl was in tears. 这个可怜的女孩泪流满面。 Her clothes were in rags. 她的衣跟穿破了。 His shoes were in holes. 他的鞋穿出窟窿了。 I only said it in fun. 我说这话只是开玩笑的。 She spoke in grief rather than in anger. 与其说她讲得很气愤，不如说她讲得很伤 心。 还有一些短语也用 in，如： in in in in jest 诙谐地， joke 开玩笑地， fairness 公正地， spite 恶意地， in revenge 报复 in mercy 宽大，in sorrow 伤心地等。 His mind was in great confusion. 他脑子里很乱。 Today everybody is in high spirits and no one is in low ebb. 今天大家都兴高采烈， 没有一个情绪低落的。 She and her classmates are in flower ages. 她和她的同学都正值妙龄。 The campaign was in full swing. 运动正值高潮中。 方面： 例：we accepted the item in principle. 我们在原则上接受了这个条款。 The backward area has achieved self-sufficient in grain. 这个落后的地区在粮食方 面已能自给。 A good teacher must be an example in study. 一个好的教师必须是学习的模范。5They are never backward in giving their views. 他们从来不怕发表自己的意见。 方式： 例： the speeches were taken down in shorthand. 所有报告都用速记记录下来了。 All The Party has always educated us in the spirit of patriotism and internationalism. 党 一贯以爱国主义和国际主义精神教育我们。 如下成语惯用 in 例： in all 总计 in advance 事前 in addition to 除......以外 in the meantime 与此同时 in place 适当地 in hopes of 或 in the hope of 怀着.......希望 in connection with 和......有关 in contact with 和......联系 in case of 倘若，万一 in conflict with 和......冲突 in force 有效的，大批 in depth 彻底地 in regard to 关于 in the neighborhood of 大约、邻近 in retrospect 回顾，一想起 in alarm 惊慌、担心 in behalf of 代表......利益 in the least 一点，丝毫 in the opinion of 据......见解 in the long run 从长远说来 in one's opinion 在......看来 in a word 总之 in word 口头上 in vain 无益地 白白地 in case 如果，万一，以防 in detail 详细地 in haste 急急忙忙地 in conclusion 总之 in spite of 尽管 in other words... 换句话说 in love 恋爱中 in debt 负债 in fun jest、joke 玩笑地 in hesitation 犹豫不决 in wonder 在惊奇中 in return 作为回报 in the name of 以......名义 be confident in 对......有信心6be interested in 对......感兴趣 in doubt 怀疑 in public secret 公开他秘密地 in a good humor 心情情绪好 介词 at、to 表方向，攻击、位置、善、恶、分 介词 at 和 to 都可以表示方向。用 at 表示方向时，侧重于攻击的目标，往往表示 恶意；用 to 表示方向时，突出运动的位置或动作的对象，侧重表示善意。试比 较下列各句： 1. A. She came at me. 她向我扑过来。 B. She came to me. 她向我走过来。 2. A. Jake ran at John. 杰克向约翰扑过去。 B. Jake ran to John. 杰克朝约翰跑去。 3. A. He rushed at the woman with a sword. 他拿着剑向那妇女扑过去。 B. He rushed to the woman with a sword. 他带着剑向那妇女跑过去。 4. A. She shouted at the old man. 她大声喝斥那老人。 B. He shouted to the old man. 他大声向那老人说 5. A. I heard her muttering at Xiao Li. 我听见她在抱怨小李。 B. I heard her muttering to Xiao Li. 我听见她在同小李低声说话。 6. A. He talked at you just now. 他刚才还说你坏话呢。 B. She talked to you just now. 她刚才还同你谈话呢.。 7. A. She threw a bone at the dog. 她用一块骨头砸狗。 B. She threw a bone to the dog. 她把一块骨头扔给狗吃。 8. A. He presented a pistol at me. 他用手枪对着我。 B. He presented a pistol to me. 他赠送我一支手枪。 日子、日期、年月日，星期加上早午晚 以下皆用 on 例 on October the first
年 10 月 1 日 on February the thirteenth l893 1893 年 2 月 13 日 on May the first 5 月 1 日 on the sixteenth 16 号 on the first 1 号7on the second of January 或 on January the second 1 月 2 日 on a summer evening 在夏天的一个夜晚 on Boxing Day 在节礼日圣诞节次日 on New Year's Day 在元旦 on my birthday 在我的生日 但 in the Christmas holidays 在圣诞节假期 in the eighteenth century 在十八世纪 in ancient times 在古代 in earlier times 在早期 in modern times 在现代， 则用 in， the present time 现在，at the present day 当今则用 at。 on May Day 在“五?一节 on winter day 在冬天 on December 12th
年 12 月 12 日 on Monday 在星期一 on Sunday 在星期天 on Tuesday morning 星期二早晨 on Saturday afternoon 星期六下午 on Friday evening 星期五晚上 但 last night 昨夜；in the evening 在晚上 on time 准时，in time 及时，等则不同。 年月日，加早午晚，of 之前 on 代 in 例： on the morning of 18th 18 日早晨 on the evening of 4th 4 日晚上 On the eve of their departure they gave a farewell banquet and their head gave a farewell speech. 他们在临行前夕举行了一次告别宴会， 他们的团长发表了告别讲 话。 收音、农场，值日 on 例： your supervisor like the story over or on the radio last night？ 您的导师喜欢 Did 昨天从收音机里听到的故事吗？ I heard the news over or on the radio. 我从收音机里听到了这一条消息。 talk over the radio 由无线电播音 on TV 从电视里...... Hear something on the wireless 在无线电里听到 My brother works on an Army reclamation farm. 我哥哥在一个军垦农场工作。 The students are working on a school farm. 学生们正在校办农场劳动。 This is a farmer's house on a farm. 这是农场的农舍。 Who is on duty today？ 今天谁值日？ We go on duty at 8 a.m. 我们上午 8 点钟上班。 关于、基础、靠、著论 例 This afternoon we are going to listen to a report on the international situation. 今 天下午我们要听关于国际形势的报告。 Professor Shen will give us a talk on traveling in America. 沈教授将给我们做关于 美国之行的报告。8You are wrong on all these issues. 在这些问题上你的看法都错了。 The belief is based on practical experience. 这种信念是以实际经验为基础的。 Theory must be based on practice. 理论必须以实践为基础。 The people in the south live on rice. 南方人主食大米。靠 The citizens live on their salaries. 城市人靠薪金生活。 You can't afford luxuries on an income of 100 Yuan a month. 靠月薪 100 元的收入， 你是买不起奢侈品的。 Her pet dogs were fed on the choicest food. 她用精饲料喂养她心爱的狗。 专靠损害别人过 He is just a scrounger who lives on other people. 他正是一个小偷， 日子。 Keep the kettle on the boil =boiling . 让水壶的水一直开着。 The enemy are on the run =running . 敌人在逃跑。 on 后接 the 加上一个作名词的动词.其意义与现在分词所表达的相近。类似例子 很多如： on the march 在行军中，on the mend 在好转中，on the prowl 徘徊，on the move 活动中，on the scrounge 巧取豪夺埋语 ，on the go 活跃，忙碌，on the lookout 注意，警戒，on the watch 监视着。on the hop 趁不备抓住某人等等。 on the People's Democratic Dictatorship《实践论》和《矛盾论》 on the People's Democratic Dictatorship《论人民民主专政》 〃on Coalition Government〃 《论联合政府》 着、罢、出售、偷、公、假，故意、支付，相反、准 注：口诀中的着指着火，罢指罢工，偷指偷偷地，公指出差、办公事；假指休假， 准指准时。 例：The house next to mine was on fire. 我邻居的房子着火了。 The workers of the railway station were on strike. 铁路工人罢工了。 Grapes and big water melons from Sin kiang are on sale on a large sale. 新疆葡萄和 西瓜大量上市了。 do something on the sly quiet . 秘密地暗地里，偷偷地 做某事。 I've come here on business. 我是有公事来的。 They went to Bern on a mission. 他们到伯尔尼去执行一项使命。 They has been away on a long trip. 他们出去做一次长途旅行。 I'll go home on leave next month. 下月我将休假回家。 I went on business to Shanghai. I did not take leave. 我是公出去上海的，不是不告 面别。 She came to see you on purpose. 她是专程来看你的。 He came here on purpose to discuss it with you. 他到这来是要与你讨论这件事的。 This lunch is on me. 〃No. let's go Dutch.〃 “这顿午饭我付钱。” “不，还是各付各的” On the contrary it was very easy to understand. 相反，这事儿很容易理解。 P1ease come on time. on schedule . 请准时来。 注：in time 是“及时”的意思。 The train arrived on schedule. 火车准时到达。9特定时间和“一......就”，左右 on 后动名词 例：Gases expand on heating and contract on cooling. 气体加热时膨胀，冷却时收 缩。特定时间 On entering the room he found his friends dancing in high spirits. 一进屋，他就发现 他的朋友们在愉快地跳舞。 On reaching the city he called up Lao Yang. 一到城里他就给老杨打了一个电话。 I'll write to him on hearing from you. 我接到你的来信就给他写信。一......就 以及 on the left right 向左向右，on the stair 在台阶上等。 步行、驴、马、玩笑 on，cab，carriage 用 in 例：On foot 步行 on horse 骑马 on donkey 骑驴。 He rode on blood flowing from his side. 他骑着马，鲜血从腰部流下来。 The soldier of the Eighth Route Army rode 100 li on a horse a day in order to catch up with his unit. 为赶上部队，那位八路军战士骑马日行百里。 Go on horse back 骑马去！ You are having me on 你和我开玩笑呢 in cab 和 in carriage 不能用 on 或 by cab 或 carriage at 山脚、门口在当前，速、温、日落价核心 即在山脚下、在门口、在目前，速度、以......速率、温度、在日落时、在...... 核心要用 at。 例：At the foot of the mountain there are thirty of our comrades. 在山脚下，有我们 30 个同志。 There is a beautiful lake at the foot of the hill. 山脚下有一个美丽的 湖。 At the gate of the house there are many children playing glass ball. 门 口有一大群孩子在玩玻璃球。 Who's standing there at the door？ 谁站在门口？ I don't need the dictionary at present. 我现在还不需要这本词典。 He is at present in Washington. 他目前正在华盛顿。 The train runs at fifty kilometers an hour. 火车每小时行驶 50 公里。 We built the plant at top speed and minimum cost. 我们以最低的投资，最 高的速度修建了该工厂。 at home 在国内，在家里 at ten degrees centigrade 在摄氏 10 度 at minus ten degrees centigrade 摄氏零下 10 度 Water freezes at 0°centigrade.水在摄氏零度结冰。 Water usually boils at 100°. 水通常在摄氏 l00 度沸腾。 at the rate of 49 miles an hour at full speed 全速 at zero 在零度 at a good price 高价 at a low cost 低成本 at a great cost 花了很大代价 at that time 在当时10Evaporation takes place at all temperatures. 蒸发在任何温度下都能发生。 at 100RPM revolution per minute 每分钟 100 转 at a high speed 高速 The soldiers launched an attack upon the enemy at sunset. 战士们在日落 时对敌人发起了攻击。 at daybreak 日出时 The force at the core leading our cause forward is the Chinese Communist Party. 领导我们事业的核心力量是中国共产党。 The atom has a nucleus at its core. 在原子的中心有一个原子核。 At the beginning of this term the teacher in charge of our class was very strict with us. 这学期开始，我们的班主任老师对我们要求非常严格。 for 1. prep. (1)因为，由于 for this reason (2) 表示时间\距离长度； for three days； He ran for three miles. (3) 为了 ：What do you come here for? (4) 表示等价交换： He sold his house for 30,000 dollars. (5) 开往；前往 We set off for London. (6) 代；替；代表 Red is for danger. (7) 用于 for + 名词或代词 + to + 不定式动词的名词短语中 The bell rang for the lesson to begin. 2. conj 因为 （表示推测或附加的原因， 前后为并列句） It must have rained last night, for the ground is wet. Kuntta ( a prisoner ) knew day broke, for he heard the birds singing. 尽管 for 的用法较多，但记住常用的几个就可以了。 It is time for 的用法 [ 标签：it is,time,用法 ] 比如 It is time for the bed 对吗 后面不加 the 一般是 It is time for doing sth/加名词 如 It is time for bed.it 的基本用法⑴. 用作人称代词，代替前文提到过的事物。 The train has arrived. It arrived half an hour ago. ⑵. 用以代替提示代词 this, that。 ― What’s this?11― It’s a knife. ― Whose watch is that? ― It’s mine. ⑶. 起指示代词的作用，指一个人或事物。 ― Who is knocking at the door? ― It’s me. ⑷. 指环境情况等。 It was very noisy (quiet) at the very moment. ⑸. 指时间、季节等。 ― What time is it? ― It’s eight o’clock. It often rains in summer here. ⑹. 指距离。 It is a long way to the school. ⑺. 作形式主语。 It is not easy to finish the work in two days. It is no use crying over spilt milk. It is as pity that you didn’t read the book. ⑻.作形式宾语。 I think it no use arguing with him. I found it very interesting to study English. He made it clear that he was not interested in that subject. ⑼. 用于强调结构。 It was Xiaoming whom(that)I met in the street last night. It was in the street that I met Xiaoming last night. It ws last night that I met Xiaoming in the street. It was I who met Xiaoming in the street last night. 2、含有“It is …”的句型 ⑴. It is time ( for sb. ) to do sth. It is ( high ) time that sb. did sth. ( 虚拟语气 ) ⑵. It is + 形容词（ +of / for sb. ）+ to do sth. 通常用 of 的词有 brave、clever、careful、hopeless、kind、good、nau ghty、nice、silly、stupid、foolish、wise 等。 ⑶. It is + 形容词 + that + sb. + ( should ) do sth.（虚拟语气） 能用于这个句型的形容词有 strange、wonderful、natural、good、proper、ri ght、wrong、well、fortunate、important、necessary、useless、likely、p robable、impossible 等。有时可省去 should 而直接用动词原形。如： It is important that we should pay close attention to grain. It is natural that he（should）say so. ⑷. It is no use / good + doing sth. It is no use trying again = It is of no use to try again. ⑸. It is + 被强调部分 + that / who + …12Was it in the street that you met her? Who was it that called him“comrade”? It was not until yesterday that I met my old friend. It is in a small factory that my brother is going to work. （注意上述各句均为强调句型的“考点”） 比较： It is a small factory where my brother is going to work. （定语从句） ⑹. It is said /reported / announced / ( well ) known … that… ⑺. It is/was + 时间 + since … 从……已多久了。 It is three years since I met him in Beijing. It was a long time since I (had) lived in that small mountain villa ge with these farmers. （注意两句中的时态） It is five months since I arrived in New York. 我到纽约已经五个月了。 It is five months since I was in New York. 我离开纽约已经五个月了。 （注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则 从动作或状态结束时算起。） ⑻ .It is + 时间 + before … 这个句型和上面句型中时间都是时间段，如 long、years、months、weeks、f ive days、three hours、twenty minutes 等。不过主句的时态多用一般将来时 或一般过去时。 It will be several years before we meet again. 我们要过好几年才能再见面。 It was not long before they set out for the front. 不久他们就出发去了前线。 ⑼. It is /was/will be the first/second/third … time that … It is the first time that I have been here. It was the second time that he had seen the film. ⑽. It is up to sb. to do sth … 应由某人做某事。 It is up to you to decide whether w1. it 的基本用法 ⑴. 用作人称代词，代替前文提到过的事物。 The train has arrived. It arrived half an hour ago. ⑵. 用以代替提示代词 this, that。 ― What’s this? ― It’s a knife. ― Whose watch is that? ― It’s mine. ⑶. 起指示代词的作用，指一个人或事物。 ― Who is knocking at the door?13― It’s me. ⑷. 指环境情况等。 It was very noisy (quiet) at the very moment. ⑸. 指时间、季节等。 ― What time is it? ― It’s eight o’clock. It often rains in summer here. ⑹. 指距离。 It is a long way to the school. ⑺. 作形式主语。 It is not easy to finish the work in two days. It is no use crying over spilt milk. It is as pity that you didn’t read the book. ⑻.作形式宾语。 I think it no use arguing with him. I found it very interesting to study English. He made it clear that he was not interested in that subject. ⑼. 用于强调结构。 It was Xiaoming whom(that)I met in the street last night. It was in the street that I met Xiaoming last night. It ws last night that I met Xiaoming in the street. It was I who met Xiaoming in the street last night. 2、含有“It is …”的句型 ⑴. It is time ( for sb. ) to do sth. It is ( high ) time that sb. did sth. ( 虚拟语气 ) ⑵. It is + 形容词（ +of / for sb. ）+ to do sth. 通常用 of 的词有 brave、clever、careful、hopeless、kind、good、nau ghty、nice、silly、stupid、foolish、wise 等。 ⑶. It is + 形容词 + that + sb. + ( should ) do sth.（虚拟语气） 能用于这个句型的形容词有 strange、wonderful、natural、good、proper、ri ght、wrong、well、fortunate、important、necessary、useless、likely、p robable、impossible 等。有时可省去 should 而直接用动词原形。如： It is important that we should pay close attention to grain. It is natural that he（should）say so. ⑷. It is no use / good + doing sth. It is no use trying again = It is of no use to try again. ⑸. It is + 被强调部分 + that / who + … Was it in the street that you met her? Who was it that called him“comrade”? It was not until yesterday that I met my old friend. It is in a small factory that my brother is going to work. （注意上述各句均为强调句型的“考点”）14比较： It is a small factory where my brother is going to work. （定语从句） ⑹. It is said /reported / announced / ( well ) known … that… ⑺. It is/was + 时间 + since … 从……已多久了。 It is three years since I met him in Beijing. It was a long time since I (had) lived in that small mountain villa ge with these farmers. （注意两句中的时态） It is five months since I arrived in New York. 我到纽约已经五个月了。 It is five months since I was in New York. 我离开纽约已经五个月了。 （注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则 从动作或状态结束时算起。） ⑻ .It is + 时间 + before … 这个句型和上面句型中时间都是时间段，如 long、years、months、weeks、f ive days、three hours、twenty minutes 等。不过主句的时态多用一般将来时 或一般过去时。 It will be several years before we meet again. 我们要过好几年才能再见面。 It was not long before they set out for the front. 不久他们就出发去了前线。 ⑼. It is /was/will be the first/second/third … time that … It is the first time that I have been here. It was the second time that he had seen the film. ⑽. It is up to sb. to do sth … 应由某人做某事。 It is up to you to decide whethe e start or not.15}