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      7.14 不定式的時(shí)態(tài)和語(yǔ)態(tài)
      ?
      時(shí)態(tài)\語(yǔ)態(tài)    主動(dòng)     被動(dòng)
      一般式      to do      to be done
      進(jìn)行式      to be doing  
      完成式      to have done   to have been done
      完成進(jìn)行式    to have been doing  

      1) 現(xiàn)在時(shí):一般現(xiàn)在時(shí)表示的動(dòng)詞,有時(shí)與謂語(yǔ)動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生,有時(shí)發(fā)生在謂語(yǔ)動(dòng)詞的動(dòng)作之后。
         He seems to know this.
         I hope to see you again. = I hope that I'll see you again. 我希望再見(jiàn)到你。

      2) 完成時(shí):表示的動(dòng)作發(fā)生在謂語(yǔ)動(dòng)詞表示的動(dòng)作之前。
        I'm sorry to have given you so much trouble.
        He seems to have caught a cold.

      3) 進(jìn)行時(shí): 表示動(dòng)作正在進(jìn)行,與謂語(yǔ)動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生。
        He seems to be eating something.

      4) 完成進(jìn)行時(shí):
        She is known to have been wreaking on the problem for many years.











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