if,whether引导的名词从句

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if, whether引导的名词从句

1yes-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, 如:

主语:Whether the plan is feasible remains to be proved. 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…orwhethe…or not构成,例如:

Please tell me whether / if they are Swedish or Danish. 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。








hardly/scarcely…when/before, no sooner…than as soon as都可以表示"…"的意思,例:

I had hardly / scarcely got home when it began to rain. I had no sooner got home than it began to rain. As soon as I got home, it began to rain.

注意:如果hardly, scarcely no sooner置于句首,句子必须用倒装结构:

Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain.






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