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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. whether 和if 可以互换吗 在哪些情况下可以呢 下面的几个情况可不可以 "Have you seen the film" He asked me. →he asked me whether I had seen the film. "You've already got well, Haven't you" she asked. →she asked whether I had a already got well. He asked, "Are you a Party member or a League member" →He asked me If I was a Party member or a League member, 这三个都做“是否”讲 是可以互换的 下面的情况不能互换: 1.Whether可以与or not 连用构成whether…or not或者whether or not,但if一般没有这种用法; 2.如果宾语从句是否定结构,则用if,而不用whether; 3.介词的宾语从句只能用Whether引导; 4、引导主语从句、表语从句、同位语从句时都用whether; 5.Discuss 或decide 等动词后,通常只跟whether引导的宾语从句,而不跟if引导的宾语从句; 6. Whether后面可以接不定式短语,而if不能 ; 7.在主从复合句中,为避免产生歧义,不用if而用whether,而使意义更加明确; 本文来源:https://www.dywdw.cn/025ebb63ee630b1c59eef8c75fbfc77da3699755.html