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whEthEr和iF的区别

一、引导宾语从句 这时两者的含义区别很小,一般可通用。 I don't know whether/if they will come to help us. 但是,当whether与or not连成一个词组时,whether不可换用if。 I don't know whether or not they will come for our help. 若whet...

一、引导宾语从句 这时两者的含义区别很小,一般可通用. I don't know whether/if they will come to help us. 但是,当whether与or not连成一个词组时,whether不可换用if. I don't know whether or not they will come for our help. 若whether和...

一、引导宾语从句 这时两者的含义区别很小,一般可通用. I don't know whether/if they will come to help us. 但是,当whether与or not连成一个词组时,whether不可换用if. I don't know whether or not they will come for our help. 若whether和...

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...

一、引导宾语从句 这时两者的含义区别很小,一般可通用。 I don't know whether/if they will come to help us. 但是,当whether与or not连成一个词组时,whether不可换用if。 I don't know whether or not they will come for our help. 若whet...

一、引导宾语从句,一般既可用whether也可用if。但 1 or not放在whether之后时,只能用whether不用if。 I don’t know whether or not he will come. 我不知道他是不是回来。 注1:如果or not放在whether所引导的从句句尾,则可以用if来替换。 I ...

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/i...

whether和if的用法区别 1)whether和if常用来引导宾语从句,这时两者的含义区别很小,一般可通用。例如: ①I don't know whether/if they will come to help us. 我不知道他们是否来帮助我们。 ②I am not sure whether/if I'll have time to go w...

whether与if用法区别: 当whether与or not连成一个词组时,whether不可换用if。在介词后面只能用whether,不能用if。引导主语从句时,只能用whether,不能用if。引导表语从句时,只能用whether,不能用if。引导同位语从句时,常用whether。if可...

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