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was doing是什么时态的标志词

回答
瑞文问答

2021-09-16

过去进行时。表示过去某时正在进行的状态或动作。句式:主语+was/were+动词ing+其他。
种类:
1、表示过去某一时间内(正在)进行的动作。如:I was doing my homework at 9 oclock p.m. last Sunday.
2、表示一动作正在进行时,另一动作同时正在进行。

扩展资料

  have的'用法:

  一、have作助动词:

  主要变化形式:have,has,had

  动名词/现在分词:having

  1)have +过去分词,构成完成时态,例:

  He has left for London.他已去了伦敦。

  By the end of last month, they had finished half of their work.

  上月末为止,他们已经完成工作的一半。

  2)have + been +现在分词,构成完成进行时(现在完成时),例:

  I have been studying English for ten years.

  我一直在学英语,已达十年之久。

  3)have+been +过去分词,构成完成时态的被动语态,例:

  English has been taught in China for many years.

  中国教英语已经多年。

  二、have作普通动词形式:

  为表示习惯动作,do与have连用:

  — Do you have earthquakes in your country? 你们国家地震吗?

  — Yes,but we don’t have them very often. 有,但不经常。

  have意指take(a meal)(吃),give(a party)(举行)等。

  We have lunch at one.

  我们1点钟吃饭。

  They are having a party tomorrow.

  他们明天举行聚会。

  I hope you’ll have a good holiday.

  我希望你愉快地度过假期。