Question

I have no doubt that he will make it, but I wonder ____ he is really ready enough.

A. what B. why C. whether D. that

Answer

C

【解析】

试题分析：本题考查宾语从句。句意：我不怀疑他会成功，但是我很疑惑他是否真的准备好了。本句中宾语从句的成分完整，所以排除连接代词A what；根据句意，此处缺少“是否”的意思，所以答案选择whether；B why 译为“为什么”； D that 在宾从不缺主要成分，不缺意思时使用。

【名师点睛】

本题考查了whether引导的宾语从句，在名词性从句中whether和if是经常被考查的内容，whether与if作“是否”讲,在用法上有相同之处,也有不同之处.

一、相同之处.

1.whether和if都能引导宾语从句,常置于see, ask, learn, tell, wonder, doubt, find out等动词之后.

如：He asked me whether/is I could help him. I want to know whether/if he lives there.

2.whether和if都可用it作形式主语从句中.如：it's uncertain whether/if he'll come this evening.

3.在be uncertain/doubtful之后,常用whether引导宾语从句,有时也可以用if,如：We are uncertain whether/if Mary will come.

二、不同之处.

1.whether可置于句首引导主语从句,而if不能.如：

___the 2000 Olympic Games will be in Beijing is not known yet.

A. whether B. If C. Whether D. That 答案是C.

2.whether可用在介词之后,引导宾语从句,而If则不能.如：

Success depends on whether we make enough effort.

3.whether可引导表语从句,if则不能.如：The question is whether it is not worth doing.

4.在名词之后引导同位语从句时,用whether而不用if.如：

The question whether the students answered correctly should be decided by the teacher.

5.whether后可接不定式,而if不能.如：Please tell us whether to go or stay here.

6.在有些动词（如discuss）之后,只能用whether,而不用if引导宾语从句.如：We discussed whether we should close the shop.

7.在引导否定概念in宾语从句时,只能用if,而不用whether.如：he asked me if I hadn't finished my work.

考点：考查宾语从句