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It is/was ...的常考句型有：
It is no use crying for the spilt milk.
It is very kind of you to offer your seat to me.
It is high time that I went to expect my friend.
It is the second time that Kate has visited the Summer Palace.
It was ten days since John had left Shanghai for San Francisco.
It wasn’t until nearly a month later that I received the manager’s reply.
It is considered that Abraham Lincoln is one of the greatest presidents in American history.
[It is/was+名词/形容词+动名词短语]
It is very nice meeting you. 见到你非常高兴。
It was pleasant and comfortable sitting here. 坐这儿既愉快又舒适。
说明：在这个句式中，动名词短语主要强调过去的动作或状态。
[It is/was+形容词/名词+of/for sb.+动词不定式短语]
It is friendly of Liu Wei to help the old woman find her home. 刘伟非常友好，他帮那位老人找到了她的家。
It is a good idea for you to go out for a walk. 你出去走走是个好主意。
说明：在这个句式中，如果be动词后的形容词是描述其后介词短语中的人的品行或特征的形容词，则该形容词后的介词应用of，其他的时候均用for。如果不定式的逻辑主语是“我们大家”或“任何人”，那么，这个逻辑主语（介词短语）可以省略。如：
It is generally considered unwise to give a child whatever he or she wants. 孩子想要什么就给他（或她）什么被认为是不明智的。
[It is/was+过去分词/名词/形容词+主语从句]
It was true that Tom had been in prison for several years. 汤姆曾经蹲过几年监狱是真的。
It is reported that the injured are being well treated in hospital. 据报道，伤员在医院正接受很好的治疗。
He hasn’t slept at all for three days. It is no wonder he is tired out. 他有三天没合眼了，难怪他那么疲倦。
说明：在简化“It is/was+过去分词+主语从句”时，通常是用从句的主语来充当被简化句子的主语，而原先主语从句中的谓语写为不定式。如：
Abraham Lincoln is considered to be one of the greatest presidents in American history. 亚伯拉罕·林肯被认为是美国历史上最伟大的总统之一。
[It is/was some time+since从句]
It is three months since I came to this school. 我到这个学校已经三个月了。
说明：1. 主句中的is和was分别可以用has been和had been代替。如：
It has been three months since I came to this school. 我到这个学校已经三个月了。
It had been ten days since John had left Shanghai for San Francisco. 约翰离开上海去圣弗兰西斯科已经有十天了。
2. 在这个句式中，从句中的谓语要用一般过去时或过去完成时。
3. 在这个句式中，从句中的谓语动词如果是状态动词或具有延续性的动作动词，分析时要特别注意，决不可望文生义。如：
It was seven months since Mary had been married. 马丽离婚有七个月了。（误：马丽结婚有七个月了。）
It is five years since Mike worked in the south of China. 迈克不在中国南方工作已有五年了。（误：迈克在中国南方工作已有五年了。）
[It is/was the first/second ... time+that从句]
It was the first time that I had been to Hainan. 那是我第一次到海南。
说明：在这个句式中，从句中的谓语时态通常只用现在完成时和过去完成时，在非正式文体中，that可省略。
[It is/was （high） time/a pity/necessary+that从句] It is a pity that you failed the exam again. 真遗憾，你又没考过关。
It is necessary that you should understand each other. 你们真该好好地互相了解。
说明：在这个句式中，从句中的谓语通常要用虚拟语气，在非正式文体中，that可省略。如：
It is a pity （that） you missed the chance of going abroad to study. 很遗憾，你没抓住这次去国外学习的机会。
[It is/was+被强调的部分（who/whom/that从句）]
It is Yao Ming who is the first Chinese basketball player entering NBA. 姚明是第一个进入NBA的中国篮球运动员。
It was until twelve o’clock that Cathy’s father waited for her home. 直到十二点，凯茜的父亲还在等她回家。
说明：1. 在非正式文体中，who/whom/that均可省略。如：
It is you （who/whom） I’m thinking of all the time. 你是我永远的牵挂。
It was then （that） John heard the terrible steps. 就在那时，约翰听到了那可怕的脚步声。
2. 当被强调的部分是疑问代词（副词）或关系代词（副词）时，连接词只用that。如：
Why is it that everyone thinks I’m a teacher？ 为什么大家都认为我是老师？
I’ll try to find who it is that prevents so many people from taking part in the sports meet. 我要尽力去了解是谁阻止那么多人去参加运动会。
3. 在强调状语时，如果状语前的句子（主句）中含有否定词not，通常应将not放在被强调的状语之前。如：
It was not until midnight that he went back home after the experiment. 他直到深夜实验做完后才回家。
It is not for several years that I have had an opportunity of seeing the birds again. 我已经有好几年没有机会看到那些鸟了。
It was not until the operation was over that Dr. Bethune left the temple. 白求恩大夫直到手术做完了才离开那座庙宇。
[练习]
1. _______ is a fact that English is being accepted as an international language.
A. There B. This C. That D. It
2. It was because of bad weather _______ the football game had to be put off.
A. so B. so that C. why D. that
3. It was for this reason _______ her uncle moved out of New York and settled down in a small village.
A. which B. why C. that D. how
4. It is the ability to do the job _______ matters not where you come from or what you are.
A. one B. that C. what D. it
5. It was ______ he said _____ disappointed me.
A. what； that B. that； that
C. what； what D. that； what
[参考答案]
1～5 DDCBA
It is no use crying for the spilt milk.
It is very kind of you to offer your seat to me.
It is high time that I went to expect my friend.
It is the second time that Kate has visited the Summer Palace.
It was ten days since John had left Shanghai for San Francisco.
It wasn’t until nearly a month later that I received the manager’s reply.
It is considered that Abraham Lincoln is one of the greatest presidents in American history.
[It is/was+名词/形容词+动名词短语]
It is very nice meeting you. 见到你非常高兴。
It was pleasant and comfortable sitting here. 坐这儿既愉快又舒适。
说明：在这个句式中，动名词短语主要强调过去的动作或状态。
[It is/was+形容词/名词+of/for sb.+动词不定式短语]
It is friendly of Liu Wei to help the old woman find her home. 刘伟非常友好，他帮那位老人找到了她的家。
It is a good idea for you to go out for a walk. 你出去走走是个好主意。
说明：在这个句式中，如果be动词后的形容词是描述其后介词短语中的人的品行或特征的形容词，则该形容词后的介词应用of，其他的时候均用for。如果不定式的逻辑主语是“我们大家”或“任何人”，那么，这个逻辑主语（介词短语）可以省略。如：
It is generally considered unwise to give a child whatever he or she wants. 孩子想要什么就给他（或她）什么被认为是不明智的。
[It is/was+过去分词/名词/形容词+主语从句]
It was true that Tom had been in prison for several years. 汤姆曾经蹲过几年监狱是真的。
It is reported that the injured are being well treated in hospital. 据报道，伤员在医院正接受很好的治疗。
He hasn’t slept at all for three days. It is no wonder he is tired out. 他有三天没合眼了，难怪他那么疲倦。
说明：在简化“It is/was+过去分词+主语从句”时，通常是用从句的主语来充当被简化句子的主语，而原先主语从句中的谓语写为不定式。如：
Abraham Lincoln is considered to be one of the greatest presidents in American history. 亚伯拉罕·林肯被认为是美国历史上最伟大的总统之一。
[It is/was some time+since从句]
It is three months since I came to this school. 我到这个学校已经三个月了。
说明：1. 主句中的is和was分别可以用has been和had been代替。如：
It has been three months since I came to this school. 我到这个学校已经三个月了。
It had been ten days since John had left Shanghai for San Francisco. 约翰离开上海去圣弗兰西斯科已经有十天了。
2. 在这个句式中，从句中的谓语要用一般过去时或过去完成时。
3. 在这个句式中，从句中的谓语动词如果是状态动词或具有延续性的动作动词，分析时要特别注意，决不可望文生义。如：
It was seven months since Mary had been married. 马丽离婚有七个月了。（误：马丽结婚有七个月了。）
It is five years since Mike worked in the south of China. 迈克不在中国南方工作已有五年了。（误：迈克在中国南方工作已有五年了。）
[It is/was the first/second ... time+that从句]
It was the first time that I had been to Hainan. 那是我第一次到海南。
说明：在这个句式中，从句中的谓语时态通常只用现在完成时和过去完成时，在非正式文体中，that可省略。
[It is/was （high） time/a pity/necessary+that从句] It is a pity that you failed the exam again. 真遗憾，你又没考过关。
It is necessary that you should understand each other. 你们真该好好地互相了解。
说明：在这个句式中，从句中的谓语通常要用虚拟语气，在非正式文体中，that可省略。如：
It is a pity （that） you missed the chance of going abroad to study. 很遗憾，你没抓住这次去国外学习的机会。
[It is/was+被强调的部分（who/whom/that从句）]
It is Yao Ming who is the first Chinese basketball player entering NBA. 姚明是第一个进入NBA的中国篮球运动员。
It was until twelve o’clock that Cathy’s father waited for her home. 直到十二点，凯茜的父亲还在等她回家。
说明：1. 在非正式文体中，who/whom/that均可省略。如：
It is you （who/whom） I’m thinking of all the time. 你是我永远的牵挂。
It was then （that） John heard the terrible steps. 就在那时，约翰听到了那可怕的脚步声。
2. 当被强调的部分是疑问代词（副词）或关系代词（副词）时，连接词只用that。如：
Why is it that everyone thinks I’m a teacher？ 为什么大家都认为我是老师？
I’ll try to find who it is that prevents so many people from taking part in the sports meet. 我要尽力去了解是谁阻止那么多人去参加运动会。
3. 在强调状语时，如果状语前的句子（主句）中含有否定词not，通常应将not放在被强调的状语之前。如：
It was not until midnight that he went back home after the experiment. 他直到深夜实验做完后才回家。
It is not for several years that I have had an opportunity of seeing the birds again. 我已经有好几年没有机会看到那些鸟了。
It was not until the operation was over that Dr. Bethune left the temple. 白求恩大夫直到手术做完了才离开那座庙宇。
[练习]
1. _______ is a fact that English is being accepted as an international language.
A. There B. This C. That D. It
2. It was because of bad weather _______ the football game had to be put off.
A. so B. so that C. why D. that
3. It was for this reason _______ her uncle moved out of New York and settled down in a small village.
A. which B. why C. that D. how
4. It is the ability to do the job _______ matters not where you come from or what you are.
A. one B. that C. what D. it
5. It was ______ he said _____ disappointed me.
A. what； that B. that； that
C. what； what D. that； what
[参考答案]
1～5 DDCBA