摘要: 将普通的一般疑问句变成宾语从句时.则用if /whether连接.同时变成陈述句语序. Are you an English teacher ?-------He asked if I was an English teacher. 在下列情况下只能用whether 1) 介词后的宾语从句 I’m thinking about whether we should go fishing. 2) 宾语从句提前时 Whether this is true or not, I can’t say. 3) 直接与or not连用时 I don’t know whether or not he was ready. 4) 在带to 的动词不定式前 She hasn’t decided whether to go or not. if也可引导条件状语从句.表示“如果 .比较: I don’t know if he will come. If he comes ,I will tell you.

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