连接副词 where,when,how,why.如:
What she did is not yet known.她干了什么尚不清楚。
How this happened is not clear to anyone.这事怎样发生的,谁也不清楚。
Whoever comes is welcome.不论谁来都欢迎。
Wherever you are is my home my only home.你所在的任何地方就是我的家我唯一的家。
解释:
1.主语从句能用it作形式上的主语。常以it作形式主语的句型有:
A.It+be+形容词(obvious,true,natural,surprising,good,wonderful,funny,possible,likely,certain,probable,etc.)+that从句。如:
It is certain that she will do well in her exam.毫无疑问她考试成绩会很好。
It is probable that he told her everything.很可能他把一切都告诉她了。
B.It+be+名词词组(no wonder,an honor,a good thing,a pity,no surprise,etc.)+that从句。如:
Its a pity that we cant go.很遗憾我们不能去。
Its no surprise that our team should have won the game.我们没赢这场比赛真意外。
C.It+be+过去分词(said,reported,thought,expected,decided,announced,arranged,etc.)+that从句。如:
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