It is ( has been ) 5 years since his father died.
11. It is when
该句型中的 when 引导的是一个时间状语从句,主句中的 it 指时间,表语由具体的时间充当。常译为当的时候,是。
It was 5 oclock when he came here.
12. It be before
该句型主句中的 it 指时间, 主句中的时态常是将来一般时或过去时两种时态。主句中的表语多是long, not long , 3 days , 2 weeks 等表示时间段的词或短语。常译为之后。
It was 3 days before he went to Beijing.
It will be not long before he finishes his job.
13. It happens (seems, looks, appears ) that
该句型中it是形式主语,that 引导的是主语从句,主句中的happen , seem等词是不及物动词。
It happened ( so happened ) that he met his teacher in the street. 碰巧
It seems that he will be back in a few days. 看来
14. It takes sb. to do sth.
该句型中的不定式是真正的主语,it是形式主语,句型中的直接宾语是时间。常译为做要花费某人。
It took thousands of people many years to build the Great Wall.
15. It is no good (use ) doing sth.
该句型中的真正主语是动名词短语,主句中的表语可以是no good , ( not any good ) , no use , ( not any use )。
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2016-03-17
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