同位语: I have no idea when he will return.
我不知道他什么时候回来。
形容词宾语: I'm not sure why she refused their invitation.
我尚不能肯定她为什么拒绝他们的邀请。
介词宾语: That depends on where we shall go.
那取决于我们去哪儿。
2)Wh-从句作主语也常用先行词it做形式主语,而将wh-从句置于句末。例如:
It is not yet decided who will do that job.
还没决定谁做这项工作。
It remains unknown when they are going to get married.
他们何时结婚依然不明。
IV. if, whether引导的名词从句
1)yes-no型疑问从句
从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的,因此也分别被称为yes-no型疑问句从句和选择型疑问从句,其功能和wh-从句的功能相同。例如:
主语:Whether the plan is feasible remains to be proved.
这一计划是否可行还有等证实。
宾语:Let us know whether / if you can finish the article before Friday.
请让我们知道你是否能在星期五以前把文章写完。
表语:The point is whether we should lend him the money.
问题在于我们是否应该借钱给他。
同位语: They are investigating the question whether the man is trustworthy.
他们调查他是否值得信赖。
形容词宾语: She's doubtful whether we shall be able to come.
她怀疑我们是否能够前来。
介词宾语: I worry about whether he can pass through the crisis of his illness.
我担心他是否能度过疾病的危险期。
2)选择性疑问从句
选择性疑问从句由关联词if/whether...or或whethe...or not构成。例如:
Please tell me whether / if they are Swedish or Danish.
请告诉我他们是瑞典人还是丹麦人。
I don't care whether you like the plan or not.
我不在乎你是否喜欢该计划。
V. 否定转移
1)将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中,即主句的谓语动词用否定式,而从句的谓语动词用肯定式。例如:
I don't think I know you. 我想我并不认识你。
I don' t believe he will come. 我相信他不回来。
注意:若谓语动词为hope,宾语从句中的否定词不能转移。例如:
I hope you weren't ill. 我想你没有生病吧。
2)将seem, appear 等后的从句的否定转移到前面。例如:
It doesn't seem that they know where to go. 看来他们不知道往哪去。
It doesn't appear that we'll have a sunny day tomorrow. 看来我们明天不会碰上好天气。
3)有时将动名词,介词短语或整个从句的否定转变为对谓语动词的否定。例如: