do和have的区别和用法

回答
瑞文问答

2021-08-20

have的用法;
have +过去分词,构成完成时态。例如:
He has left for London. 他已去了伦敦。
By the end of last month, they had finished half of their work.  上月未为止,他们已经完成工作的一半。

扩展资料

  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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