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...
因此用forget to do sth.而forget doing sth 表示灯已经关上了,而 自己忘记了这一事实。此处不符合题意。 2.remember to do记得去做某事(未做); remember doing记得做过某事(已做) Remember to go to the post office after school. 记着放学后去趟邮局。 Don't you r...
由非谓语动词开头的、表示一个独立、完整的含义的结构叫做非谓语动词短语。 【起止标识】标记非谓语动词短语时,一定是从动词不定式(to do)、动名词(doing)或分词(现在分词doing或过去分词done)开头,到以下四种情况终止。 ① 到句尾终止,如:Li Hui is a teacher (teach...
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