我不知道明天他是否會來
補充問題：
這里用if 和whether都可以
I don't know if he will come tomorrow.
I don't know if he will come tomorrow.
為什么要用if 不能用whether
為什么要用if 不能用whether
英語人氣：459 ℃時間：2019-09-09 11:39:30
優(yōu)質(zhì)解答
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