2012完成句子考点精练：it的用法

云霞客

　　1.it作形式主语或者形式宾语时，真正的主语或者宾语可以由不定式或者从句充当。

　　Five hours is __________________(所需要的时间)for you to travel from BJ to Shanghai.(take)

　　He ____________________(没有弄清楚)when and where the meeting would be held.(make……clear)

　　This organization ________________________(已经使之成为一项制度)that all motorcycle helmets must be checked before use.(make)

　　It's already 11:00. I wonder _________________________（怎么回事）that she was two hours later on such a short trip.(come)

　　We don't consider _________________________(他们有必要)to buy a new flat since they have such a nice one to live in it.(necessary)

　　2.强调句型

　　强调句型中插入一个定语从句；当回答特殊疑问句时，有时省略that后面的内容；注意强调句型和状语从句的区别。

　　It was at the church ______(我领你参观的) last weekend that the accident took place. (show)

　　----Where was the wedding ceremony held?

　　----It was in the church ___________________(我们见面)for the first time.

　　It was the computer which broke down half way _____________________(该责备)for the loss of all my files.(blame)

　　I still wonder _________________(是什么)let him down badly. Shall we go and comfort him?(it)

　　Was it midnight________________________(火灾发生时)（break）

　　3、it表示时间的句型

　　It will（not） be +一段时间（long）+before+现在时句子表示要过或者过不了多久

　　It was （not）+一段时间（long）+before+过去时的句子表示过了或者没有过多久

　　It is/has been +一段时间+since+过去时的句子    瞬间的动作表示自从做某事已经有多久了；若是持续性的动作则表示动作已经结束了。

　　It's the first time+现在完成时的句子 It was the first time+过去完成时的句子

　　4、It……that……和sb/sth ……to……的句型的转换

　　It's reported that……= sb/sth be reported to……（若表过去的动作用have done的形式）    believe/likely/seem/known/happen等用法同上

　　Studies show that ___________________(人们更有可能)suffer from back problems if they always sit before computer screens for long hours.(likely)

　　The mudslide is reported ____________(已夺去)more than 1,400 lives in Zhouqu County.(claim)

　　Your sister is said _______________________________(粗暴对待)in the supermarket when she was doing shopping yesterday.(treat)

　　5、固定句型

　　I hate it when people talk with their mouth full.

　　I can't help it if he is always late.

　　I would appreciate it if you could give me a hand.

　　Please come whenever ___________________(你方便的时候).（convenient）

　　

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