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do和have的区别和用法

  have + been +现在分词,构成完成进行时。例如:

  I have been studying English for ten years. 我一直在学英语,已达十年之久。

  have +been +过去分词,构成完成式被动语态。例如:

  English has been taught in China for many years. 中国教英语已经多年。

  do 的`用法

  构成一般疑问句。例如:

  Do you want to pass the CET? 你想通过大学英语测试吗?

  Did you study German? 你们学过德语吗?

  do + not 构成否定句。例如:

  I do not want to be criticized. 我不想挨批评。

  He doesn't like to study. 他不想学习。

  n the past, many students did not know the importance of English.

  过去,好多学生不知道英语的重要性。

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