before doing和before to do
人气:447 ℃ 时间:2020-02-03 06:26:00
解答
before 一般做介词和连词用.做介词时后面跟名词动名词;做连词时后面跟句子,似乎没有楼主说的before to do.楼主有完整的句子吗?before do和before doing又有什么差别呢??do是动词,自然也不能跟在before之后的。
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