一道别人提过的英语题Dinner was almost over when Dan still looking hungry grinned and asked Dave _____ he wasn't going to have some bread.a.that b.if c.whether d./
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一道别人提过的英语题Dinner was almost over when Dan still looking hungry grinned and asked Dave _____ he wasn't going to have some bread.a.that b.if c.whether d./
一道别人提过的英语题
Dinner was almost over when Dan still looking hungry grinned and asked Dave _____ he wasn't going to have some bread.a.that b.if c.whether d./
一道别人提过的英语题Dinner was almost over when Dan still looking hungry grinned and asked Dave _____ he wasn't going to have some bread.a.that b.if c.whether d./
whether与if的比较:
一、whether和if都可以用作连词,引导一个名词性从句,表示“是否”.whether可以引导主语从句、表语从句、宾语从句和同位语从句;而if只能引导宾语从句.
1.引导宾语从句既可以用whether,也可以用if,两者常可以互换.whether从正反两个方面提出疑问,选择意义较强,多用于正式文体中;而if多用于口语,比较强调单方面,如:
He asked me whether / if I could lend him my bike.
Could you tell us whether / if it snows in winter in Australia?
I want to know whether / if you can come or not.
She asked them whether / if they had gone there by car or by train.
值得注意的是:
① whether 和if都可以和or not连用,但是whether之后可以直接跟or not,而if则不能,如:
I don’t care whether or not your car breaks down.
I don’t know whether or not he’s coming.
但是不可以说:
I don’t care if or not your car breaks down.
② whether引导的从句一般不可以为否定结构(选择问句的后一部分除外);而if则可以跟否定结构,如:
I don’t care if she doesn’t come.
I don’t care if it doesn’t rain.
但是,在某些动词或形容词之后,则可以用whether引导一个否定结构的句子,这种结构往往表示肯定的含义,如:
I wonder whether he doesn’t think too much of himself.
其意思相当于:I think he does think too much of himself.
③ 在个别动词之后,如discuss 等,只跟用whether引导的宾语从句,如:
They discussed whether they should close the shop.
We discussed whether Mary could join us.
④ whether 可以引导从句作介词的宾语,而if则不能,如:
I’m not interested in whether they’ll go or not.
It depends on whether we have got enough money.
⑤ whether可以直接跟动词不定式连用,而if则不能,如:
I didn’t know whether to laugh or to cry.
She hasn’t decided whether to go or not.
He was wondering whether to go home or stay at school.
2.引导主语从句(包括从句在句首的位置)应当用whether,不用if,如:
Whether it is true remains a problem.
Whether he can stay with us is another matter.
Whether he will come,I am not sure.
Whether or not he did it,I cannot tell.
3.引导表语从句用whether,不用if,如:
The question is whether you should accept it.
The question is whether he will speak at the meeting.
4.引导同位语从句用whether,不用if,如:
The question whether he’ll attend the meeting is essential.
I am in doubt whether I should agree to the plan.
二、whether 还可以引导让步状语从句,意为“不管;无论”;而if则不能引导这种从句,如:
I shall tell her about it whether you agree or not.
Whether or not the figures are accurate,we have to recheck them.
Whether or not we had a baby,we could not survive just on my salary.
三、if还可以引导条件状语从句,意为“如果;假如”,而whether则不能引导这种从句,如:
We shall do this experiment if we have time.
四、如果在从句中使用if表示“是否”容易与表示条件的状语从句混淆时,应注意避免使用if,例如:Please let us know if they are coming.这句话可以理解为“如果他们要来,请通知我们一下.”也可以理解为“请告诉我们,他们是否要来.”若表示后一层意思,应当使用,以免引起误会.
综上所述,本题应选B(本题宾语从句中是否定结构).
a.that
C
whether和if都可以引导宾语从句,表示“是否”,在口语或间接引语中两者可以互换使用。如:
I wonder if / whether I can get some advice from you.
Ask him whether / if he can come.
但在有些情况下,whether和if的用...
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C
whether和if都可以引导宾语从句,表示“是否”,在口语或间接引语中两者可以互换使用。如:
I wonder if / whether I can get some advice from you.
Ask him whether / if he can come.
但在有些情况下,whether和if的用法有一定区别。
1. whether引导的从句常可以与连词or或or not直接连用,而if一般不能。如:
正: Let me know whether you can come or not.
误: Let me know if you can come or not.
2. 当宾语从句提到句首时,只能用whether引导,而不能用if。如:
正: Whether it is true or not, I can’t tell.
误: If it is true or not, I can’t tell.
3. whether可以引导带to的不定式,if则不能。如:
正: I don’t know whether to accept or refuse.
误: I don’t know if to accept or refuse.
4. whether及其引导的成分可放于介词之后,作介词的宾语,但if不能。如:
正: I worry about whether I hurt her feelings.
误: I worry about if I hurt her feelings.
5. whether可以引导从句,作主语、表语或同位语,而if不能。如:
正: It was uncertain whether he would come.
误: It was uncertain if he would come.
正: His first question was whether Tom had arrived yet.
误: His first question was if Tom had arrived yet.
正: We must consider the question whether we will take these measures.
误: We must consider the question if we will take these measures.
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B是对滴!上面两位好厉害呀!!!!!