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haven t 是什么时态

回答
瑞文问答

2021-09-03

havent done sth, 这是现在完成时。表示某个动作已经完成或者是过去发生的动作对现在造成的影响(动作是否继续由上下文而定)

扩展资料

  时间和动作的种类

  1.一般现在时(do/does)

  2.一般过去时(did)

  3.一般将来时(will/shall do),(be going to do)

  4.一般过去将来时(would/should do),(was/were going to do)

  5.现在进行时(be doing)

  6.过去进行时(was/were doing)

  7.将来进行时(will/shall be doing)

  8.过去将来进行时(would/should be doing)

  9.现在完成时(have/has done)

  10.过去完成时(had done)

  11.将来完成时(will/shall have done)

  12.过去将来完成时(would/should have done)

  13.现在完成进行时(have/has been doing)

  14.过去完成进行时(had been doing)

  15.将来完成进行时(will/shall have been doing)

  16.过去将来完成进行时(would/should have been doing)