It was 3 days before he went to Beijing.
It will be not long before he finishes his job.
11. 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
12. 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.
13. 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 )。
It is no good learning English without speaking English.
14. It doesnt matter whether ( if ) ...
该句型中whether (if) 引导的从句是真正主语,该句型常译为不论(是否) 没关系。
It doesnt matter if they are old.
15. It is kind ( of sb. ) to do sth.
该句型中的不定式短语是真正主语,如果不定式的逻辑主语是由 of 引起,主句中的形容词必须是能表示逻辑主语特征的形容词。常见的有: bad, brave, careless, clever, cruel, foolish, good (好心的), honest, horrible, kind, lazy, modest, naughty, nice (有教养的), polite, rude, silly, stupid, wise, wrong (错误的)等。 这个句型可以改写为:sb. is kind to do sth.
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