Question

【题目】The question of __________ English will keep on changing in the future is easy __________ since it is certain that this process will continue.

A. if; to answer B. whether; to be answered

C. whether; to answer D. if; to be answered

Answer 1

【答案】C

【解析】考查名词从句和固定搭配。英语在将来是否会一直发生变化这一问题很容易回答，因为这个过程会继续是确定无疑的。of介词后的宾语从句只能用whether不能用if引导。Sth. is adj.（easy）to do 是固定句式，表示某事容易做，要用动词不定式的主动而非被动

【名师解析】引导从句时whether和if的区别

1. whether和if均可用来引导主语从句，但if引导的从句不能位于句首。

如： Whether they win or lose is all the same to me. 他们是赢是输于我都一样.

（此时whether不能换作if ）

It's doubtful whether there'll be any seats left.说不上还有没有空座位了.

(此句whether能换作if)

2.whether和if均可用来引导宾语从句。如：

①I don't know whether/if I will be able to come.我不知道我是否能来.

②I asked him whether he had done all the work himself or whether he had had any assistance.

我问他这些工作都是他自己做的还是别人帮他做的.

( 注意: 在两个供选择的从句之间若用or字, 则须重复用whether. ) 　

注:⑴　当强调宾语从句并将其提前时只能用whether。

如:Whether I'll have time to go with you I am not sure.我很难说我们是否有时间跟你们一起去。 ⑵ 从句作介词宾语时只用whether不用if。　

如:She was undecided about whether she should accept his offer.

她拿不定主意应不应该接受他的好意　

⑶ 当whether和or not连用时，只用whether不用if。

如: I don’t know whether or not he will come.我不知道他是不是回来。

I'll be happy whether/if I get the job or not我能不能得到那份工作都一样高兴

⑷ 当whether和or 连用表示明确的选择时，只用whether不用if。

如:He asked me whether I wanted to go there by train or by bus.

他问我是想乘火车还是坐公共汽车去那里。

He hesitated about whether he should drive or take the train.他开车去还是坐火车去, 犹豫不决。

⑸ 动词discuss，decide, consider等后习惯上也常用Whether引导从句，不用if。

They discussed whether they should leave at once.他们讨论了是否应该马上离开。

We discussed whether the house should be sold. 我们讨论了这房子是否应卖掉。

3.表语从句用whether引导不用if.

如:The doubt was whether you had broken the beautiful vase.

4.同位语从句用whether引导不用if. 如:

The question whether we'll build a college hasn't been settled. 是否要建一所大学的问题还未决定。

5. 在动词不定式之前，只能用whether，不能用if。

如:The question is whether to go to Munich or Vienna. 问题是去慕尼黑还是去维也纳