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haven t 是什么時態(tài)

回答
瑞文問答

2021-09-03

havent done sth, 這是現(xiàn)在完成時。表示某個動作已經(jīng)完成或者是過去發(fā)生的動作對現(xiàn)在造成的影響(動作是否繼續(xù)由上下文而定)

擴(kuò)展資料

  時間和動作的種類

  1.一般現(xiàn)在時(do/does)

  2.一般過去時(did)

  3.一般將來時(will/shall do),(be going to do)

  4.一般過去將來時(would/should do),(was/were going to do)

  5.現(xiàn)在進(jìn)行時(be doing)

  6.過去進(jìn)行時(was/were doing)

  7.將來進(jìn)行時(will/shall be doing)

  8.過去將來進(jìn)行時(would/should be doing)

  9.現(xiàn)在完成時(have/has done)

  10.過去完成時(had done)

  11.將來完成時(will/shall have done)

  12.過去將來完成時(would/should have done)

  13.現(xiàn)在完成進(jìn)行時(have/has been doing)

  14.過去完成進(jìn)行時(had been doing)

  15.將來完成進(jìn)行時(will/shall have been doing)

  16.過去將來完成進(jìn)行時(would/should have been doing)