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英语谓语动词有四种不同的时间,四种不同的方式,它们结合起来就构成了16种不同的时态.这些时态各有其基本的用法,也有其变通的用法.它们有时截然不同,有时
English predicate verbs come in four different times and four different ways, and they combine to form 16 different tenses.Those tense have their own basic usage and their alternative usage.They are sometimes quite different, sometimes