本文目录
在英语中,我们通常可以使用if和whether来引导一个条件从句。但是,有些情况下我们只能使用whether,下面是其中的五种情况:
1. 多选一
当我们需要在两个或以上的选项之间做出选择时,只能使用whether。例如:
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I haven't decided whether to go to the party or stay at home.
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She asked me whether I preferred coffee or tea.
2. 某些动词后只能使用whether
有一些动词后只能使用whether,而不能使用if。这些动词包括:wonder, ask, know, decide, 和doubt。例如:
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I wonder whether it's going to rain tomorrow.
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She asked me whether I had finished my homework.
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Do you know whether the store is still open?
3. 某些介词后只能使用whether
在某些情况下,只能使用whether跟在介词后面。例如:
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He's not sure whether to go by car or by train.
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She's been asking herself whether she made the right decision.
4. 宾语从句中只能使用whether
当whether引导的从句是主句中的宾语从句时,只能使用whether。例如:
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I don't know whether he's coming to the party or not.
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She couldn't decide whether to take the job offer or not.
5. 可以替换为“无论是……还是……”
当我们想表达“无论是A还是B”时,只能使用whether。例如:
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Whether it's raining or not, I'm going for a walk.
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I'll love you whether you're rich or poor.
以上就是只能用whether的五种情况,希望对大家的英语学习有所帮助。记住,当你遇到这些情况时,不要使用if,而应该使用whether。