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    1. have has doing是什么時態(tài)

      回答
      瑞文問答

      2024-06-06

      have has doing是現(xiàn)在完成時進行。
      現(xiàn)在完成進行時,是英語中動詞的一種基本時態(tài),其構(gòu)成為:主語+助動詞(have/has)+been+動詞的現(xiàn)在分詞+其他成分。表示動作從某一時間開始,一直持續(xù)到現(xiàn)在,或者剛剛終止,或者可能仍然要繼續(xù)下去。

      擴展資料

        The car must have been doing at least 100 miles an hour.

        這車速肯定每小時至少100英里。

        Biological systems have been doing this for billions of years

        生物系統(tǒng)億萬年來一直都是這樣。

        Some scientists have been doing research on artificial internal organs.

        一些科學(xué)家一直在研究人造內(nèi)臟。

        It is said the industrial production has been doing well.

        據(jù)說工業(yè)生產(chǎn)一直很好。

        China has been doing its bit to act the part.

        中國一直在盡力的做它應(yīng)該做的事情。

        He has been doing mass work and engaged in scientific research.

        他一直從事群眾工作和科學(xué)科研工作。