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It时间从句的区别完整解释.docx


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Revised final draft November 26, 2020
It时间从句的区别完整解释
It+时间+从句”考点***
请看下面一道题:
The field research will take e bridge.
It +will be ( was ) + 时间段 +until 从句 若主句中用一般将来时,则从句中用一般现在时,意思是从现在起到从句中谓语动词表示的动作发生时还有多长时间;若主句中用一般过去时,则从句中也用一般过去时,意思是从过去某一时间起到从句中谓语动词表示的动作发生还有多长时间。
例如:1. It will be ten days until my birthday comes.
It was only five minutes until her husband came back from work.
注意:结构"一"与结构"二"在肯定句中几乎可以通用。但是,若从句中谓语动词表示的将来动作一定或预期肯定会发生,则多用 until 引导从句;若从句中谓语动词表示的将来动作在客观上并非一定要发生时,则多用 before 引导从句。
It +is / has been ( was ) + 时间段 +since 从句 在这一结构中,主句常用一般现在时、现在完成时或一般过去时。如果 since 引导的状语从句中的谓语动词为非延续性动词,则表示"自从状语从句中的动作发生以后,时间过不了多久"。
例如:1. It is two years since Jim came to China.
2. It has been three years since they got married.
如果 since 从句中的谓语动词为延续性动词,则表示"自从从句谓语动词表示的动作结束以来,时间已过了多久"。
例如:3. It is / has been a year since he smoked.
It +is / was + 时间点 +when 从句 在这一结构中,时间之前没有介词,从句为 when 引导的时间状语从句。从句常用一般过去时,意为"当某事发生时,时间是......"。
例如:1. It was October 1st, 1949 when the People's Republic of China was founded.
What time was it when you got to school?
五 . It is /was + 时间状语 +that 从句 这是一个强调句型,被强调的部分是时间状语。表示"正是在某个时间,某事发生了"。
例如1. It was ten years ago that he joined the army.
It was yesterday afternoon that I met him in the street.
It is / was +first time / second time + ( that )从句 在这一结构中, time 前面常用序数词来修饰, that 引导的是定语从句,从句中常用现在完成时态或过去完成时态,表示"这是第......次做某事"。
例如:1. This is the first time in my life that I have come to Beijing.
It was the third time that he had asked the same question.
It is ( high ) time +that 从句 在这一结构中, that 从句中的谓语动词常用虚拟语气,即" should + 动词原形"或用动词的过去式,表示"该做某事了"。
例如:1. It is high time that we began our work.
2. It is time that he left the place.
【链接训练】
例1:It is almost five years_____we saw each other last time.(05北京)

例2:-Did Jack come back early last night?
- was not yet eight o'clock________he arrived home.       
总结二
这类考题出现频率较高,考生又极易混淆,在复****中做出归类非常必

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