(2)在时间或条件状语从句中,现在完成时可代替将来。
I won't believe it until I have seen it with my own eyes.直到我亲眼见到才相信。
(3)This/It is the first/second...time+ that从句,that从句一般用现在完成时。
This is the first time that I have been here.
这是我第一次来这里。
8.过去完成时
(1)表示某一动作或存在的状态发生在过去某一时间或某一动作之前,即“过去的过去”。
By the end of last month, we had finished all the work.
截止到上月底,我们已经完成了所有的工作。
(2)表示过去本打算实现而未实现的希望或计划,常见的有had hoped/wanted/ expected /meant /intended等。
I had hoped to send him a Christmas card , but I forgot to do so.
我本来想送他一张圣诞节贺卡,但把这事给忘了。
(3)在hardly ... when ...,no sooner... than ...句式中hardly,no sooner所在句子用过去完成时,when和than所在的句子用一般过去时,表示“一……就……”。
No sooner had he rushed out than the house fell down.他刚冲出去房子就塌了。
考点二 易混时态辨析
1.一般现在时与现在进行时
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