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英语时态学习:since谓语动词的时态

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  学习啦:当since表示时间,谓语动词的时候,since的时态应该怎么表达?下面我们一起看看这篇《since谓语动词的时态》。

  一般情况下,since短语和since从句表示时间时,通常句子(或主句)谓语动词用完成时。但是,在以下情况下,since短语与since从句表示时间时,句子(或主句)谓语动词可以不用完成时:

  (1)句子(或主句)谓主动词与情态动词连用时,不用完成时。比如:

  Since the doctor operated on his throat, the boy can speak clearly.

  自从医生给这男孩做过喉部手术后,他就能清楚地讲话了。

  He can only stay in bed since he fell ill.

  他自从生病后,就一直卧床不起了。

  (2)当since引出的状语修饰一个后置定语从句时,句子(或主语)不用完成时。比如:

  People were evacuated from the territories occupied (=which had been occupied) since the beginning of the war.

  人们被迫撤出了战争开始以来就被占领的领土。

  The couple had no photo of themselves taken (=which had been taken) since they got married.

  那对夫妻自从结婚后就没照过相。

  (3)句子(或主句)谓语是be动词,并且表示时间概念时,句子(或主句)谓语动词用一般现在时比用现在完成时普遍。比如:

  It is (has been) three years since he joined the army.

  他参军已经3年了。

  It is (has been) a long time since we parted.

  我们已分别久了。

  (4)有时句子(或主句)谓语动词be也可用过去式,此时since从句的谓语动词常用过去完成时。比如:

  It was two years since we had parted.

  我们分手有2年了。

  It was ages since I had had my last meat.

  我前一顿饭已经吃过好长时间了。

  (5)当所述是事实,或一种长期不变的习惯时,句子(或主句)谓语动词常用一般现在时。比如:

  Ever sincehe recovered, he goes for an outing every other morning.

  自从他康复后,每隔一天早晨他都要到郊外远足一次。

  My mother feels a lot better since she took the medicine.

  自从我母亲服过那药后,她感觉好多了。

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