英语四级语法基础知识之动词一

http://www.youth.cn  2013-08-06 00:00:00  中国青年网

  英语四级语法基础知识:

     Ⅰ动词(时态,语态,用法,省略,一致性等)

  时态

  1)现在完成进行时态(have/has been + -ing 分词构成):动作或状态从过去某时开始,继续到现在,可能继续下去,也可能刚刚结束。

  I’ve been writing letters for an hour.

  I’ve been sitting in the garden.

  2)过去完成进行时(由had been + ing分词构成):过去某个时刻以前一直在进行的动作。

  I’d been working for some time when he called.

  We had been waiting for her for two hours by the time she came.

  3)将来完成进行时:将来某个时刻以前一直在进行的动作。

  By next summer, he will have been working here for twenty years.

  In another month’s time she’ll have been studying here for three years.

  4)将来完成时(由shall/will have + 过去分词构成):将来某时已发生的事。

  I shall have finished this one before lunch.

  They’ll have hit the year’s target by the end of October.

编辑:廖书曼 来源:新东方在线

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