Who was responsible for the accident is not yet clear.
It is not yet clear who was responsible for the accident.
What he did is not yet known.
It is not yet known what he did.
Whether it is true remains a problem.
It remains a problem whether / if it is true.
从以上例句可以看出,这类主语从句可以直接放在句首作主语,也可以使用先行it结构,把主语从句放在后面,两种结构可以互换,意义上无差异,但用if 引导主语从句时,只能采取先行it结构,也就是说if不可以引导置于句首的主语从句。
第三类,用what、whatever、where、wherever、whoever、whichever等代词引导的主语从句,例如:
What he said at the meeting encouraged everyone.
Whoever fails to see this will make a big blunder.
这类从句一般相当于带有定语从句所修饰的名词词组,即在结构上相当于一个名词加上一个定语从句,例如:
What he wants to buy is a ten-speed bicycle.
The thing that he wants to buy is a ten-speed bicycle.
Whoever breaks the law is sure to be punished.
Anyone who breaks the law is sure to be punished.
【高中英语语法-主语从句与先行it】相关文章:
最新
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29