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现在完成时的用法

更新时间: 2021-01-14 14:58:30     

1、表示过去发生或已经完成的某一动作对现在造成的影响或结果。常与just(刚刚),already(已经),never(从来没有),ever(曾经),before(以前),yet(仍然)。

2、表示过去已经开始,一直延续到现在的动作或状态。时间状语有:for+表示一段时间的词语I have taught English for 19 years.since+表示过去时间点的词语He has been at this school since 1986.

关键词: 现在 完成 用法

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