Do you know if /whether Cathy goes to school early? 注意:只能用whether而不用if的三种情况如下: ①与or not连用:They asked us whether or not we were coming. ②在介词之后:It depends on whether it is going to rain. 3.在不定式之前:We haven’t decided whe...
know better 明白事理,很懂得(而不至于…) 例句: You know better than to do that! 你明知道不应该那么做! You are old enough to know better than to spend all your money on cloth...
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