小升初必备语法: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.

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