因为must是情态动词,
情态动词后面直接跟动词原形
其他情态动词还有can,may,have to
可以对照课本上的句子体会一下
I have lost the library's book,and I must pay for it .为什么must和pay for 之间不加TO呢?
I have lost the library's book,and I must pay for it .为什么must和pay for 之间不加TO呢?
俩个动词在一起了..
俩个动词在一起了..
英语人气：110 ℃时间：2020-03-26 01:01:59
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