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英语
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have to do和must to do可互换吗?
人气:253 ℃ 时间:2020-04-05 10:57:02
解答
must是情态动词,后面只接动词原形do,它表示主观上的,意味着可以不做的,而have_to是半情态动词,表客观,一定要做的
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