Question

【題目】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】考查名詞從句和固定搭配。英語在將來是否會一直發(fā)生變化這一問題很容易回答，因為這個過程會繼續(xù)是確定無疑的。of介詞后的賓語從句只能用whether不能用if引導。Sth. is adj.（easy）to do 是固定句式，表示某事容易做，要用動詞不定式的主動而非被動

【名師解析】引導從句時whether和if的區(qū)別

1. whether和if均可用來引導主語從句，但if引導的從句不能位于句首。

如： Whether they win or lose is all the same to me. 他們是贏是輸于我都一樣.

（此時whether不能換作if ）

It's doubtful whether there'll be any seats left.說不上還有沒有空座位了.

(此句whether能換作if)

2.whether和if均可用來引導賓語從句。如：

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

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

我問他這些工作都是他自己做的還是別人幫他做的.

( 注意: 在兩個供選擇的從句之間若用or字, 則須重復用whether. ) 　

注:⑴　當強調(diào)賓語從句并將其提前時只能用whether。

如:Whether I'll have time to go with you I am not sure.我很難說我們是否有時間跟你們一起去。 ⑵ 從句作介詞賓語時只用whether不用if。　

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

她拿不定主意應(yīng)不應(yīng)該接受他的好意　

⑶ 當whether和or not連用時，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來。

I'll be happy whether/if I get the job or not我能不能得到那份工作都一樣高興

⑷ 當whether和or 連用表示明確的選擇時，只用whether不用if。

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

他問我是想乘火車還是坐公共汽車去那里。

He hesitated about whether he should drive or take the train.他開車去還是坐火車去, 猶豫不決。

⑸ 動詞discuss，decide, consider等后習慣上也常用Whether引導從句，不用if。

They discussed whether they should leave at once.他們討論了是否應(yīng)該馬上離開。

We discussed whether the house should be sold. 我們討論了這房子是否應(yīng)賣掉。

3.表語從句用whether引導不用if.

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

4.同位語從句用whether引導不用if. 如:

The question whether we'll build a college hasn't been settled. 是否要建一所大學的問題還未決定。

5. 在動詞不定式之前，只能用whether，不能用if。

如:The question is whether to go to Munich or Vienna. 問題是去慕尼黑還是去維也納