have +過去分詞,構(gòu)成完成時(shí)態(tài)。例如:
He has left for London. 他已去了倫敦。
By the end of last month, they had finished half of their work.  上月未為止,他們已經(jīng)完成工作的一半。">

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do和have的區(qū)別和用法

回答
瑞文問答

2021-08-20

have的用法;
have +過去分詞,構(gòu)成完成時(shí)態(tài)。例如:
He has left for London. 他已去了倫敦。
By the end of last month, they had finished half of their work.  上月未為止,他們已經(jīng)完成工作的一半。

擴(kuò)展資料

  have + been +現(xiàn)在分詞,構(gòu)成完成進(jìn)行時(shí)。例如:

  I have been studying English for ten years. 我一直在學(xué)英語,已達(dá)十年之久。

  have +been +過去分詞,構(gòu)成完成式被動語態(tài)。例如:

  English has been taught in China for many years. 中國教英語已經(jīng)多年。

  do 的`用法

  構(gòu)成一般疑問句。例如:

  Do you want to pass the CET? 你想通過大學(xué)英語測試嗎?

  Did you study German? 你們學(xué)過德語嗎?

  do + not 構(gòu)成否定句。例如:

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

  He doesn't like to study.  他不想學(xué)習(xí)。

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

  過去,好多學(xué)生不知道英語的重要性。