国产欧美白嫩精品,精品思思久久99热网,亚洲国产成在线网站91,国产欧美一区二区三区户外

  • <strike id="uqc0k"></strike>
    <ul id="uqc0k"></ul>
  • <delect id="uqc0k"><s id="uqc0k"></s></delect><ul id="uqc0k"><acronym id="uqc0k"></acronym></ul>
    <center id="uqc0k"><source id="uqc0k"></source></center>
  • <strike id="uqc0k"><noscript id="uqc0k"></noscript></strike>
    <center id="uqc0k"></center>

    have had doing是什么時(shí)態(tài)

    回答
    愛揚(yáng)教育

    2022-04-03

    過去進(jìn)行時(shí)。表示過去某時(shí)正在進(jìn)行的狀態(tài)或動(dòng)作。句式:主語+was/were+動(dòng)詞ing+其他。種類:1.表示過去某一時(shí)間內(nèi)(正在)進(jìn)行的動(dòng)作。如:I was doing my homework at 9 oclock p.m. last Sunday.2.表示一動(dòng)作正在進(jìn)行時(shí),另一動(dòng)作同時(shí)正在進(jìn)行。

    擴(kuò)展資料

      have的用法

      一、have作助動(dòng)詞

      主要變化形式:have,has,had

      動(dòng)名詞/現(xiàn)在分詞:having

      1)have +過去分詞,構(gòu)成完成時(shí)態(tài),例:

      He has left for London.他已去了倫敦。

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

      上月末為止,他們已經(jīng)完成工作的一半。

      2)have + been +現(xiàn)在分詞,構(gòu)成完成進(jìn)行時(shí)(現(xiàn)在完成時(shí)),例:

      I have been studying English for ten years.

      我一直在學(xué)英語,已達(dá)十年之久。

      3)have+been +過去分詞,構(gòu)成完成時(shí)態(tài)的被動(dòng)語態(tài),例:

      English has been taught in China for many years.

      中國(guó)教英語已經(jīng)多年。

      二、have作普通動(dòng)詞形式

      為表示習(xí)慣動(dòng)作,do與have連用:

      — Do you have earthquakes in your country? 你們國(guó)家地震嗎?

      — Yes,but we don’t have them very often. 有,但不經(jīng)常。

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

      We have lunch at one.

      我們1點(diǎn)鐘吃飯。

      They are having a party tomorrow.

      他們明天舉行聚會(huì)。

      I hope you’ll have a good holiday.

      我希望你愉快地度過假期。