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7.14 不定式的时态和语态

    时态\语态    主动     被动
    一般式      to do      to be done
    进行式      to be doing  
    完成式      to have done   to have been done
    完成进行式    to have been doing  

    1) 现在时:一般现在时表示的动词,有时与谓语动词表示的动作同时发生,有时发生在谓语动词的动作之后。
      He seems to know this.
      I hope to see you again. = I hope that I'll see you again. 我希望再见到你。

    2) 完成时:表示的动作发生在谓语动词表示的动作之前。
     I'm sorry to have given you so much trouble.
     He seems to have caught a cold.

    3) 进行时: 表示动作正在进行,与谓语动词表示的动作同时发生。
     He seems to be eating something.

    4) 完成进行时:
     She is known to have been wreaking on the problem for many years.

上一条7.13 不定式的特殊句型Why not 下一条7.15 动名词与不定式

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