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  • had been doing是什么是时态？

    过去完成进行时 过去完成进行式过去完成进行时,表示“过去某段时期内在从事某事/做某事” 我这有16种。 一般现在时：do 一般过去时：did 一般将来时：will do 一般过去将来时: would do 现在进行时：is(am,are)doing 过去进行时：was (were)doing 将来进行时：will be doing 过去将来进行时：would be doing 我这有16种。 一般现在时：do 一般过去时：did 一般将

  • has been doing是什么时态

    has been doing一般用来表示现在完成进行时。现在完成进行时的结构是“I/we/you/they have been doing sth.”、“he/she/it has been doing sth.”。表示从过去某时开始一直持续到现在的动作，并且还将持续下去。 ...

  • to have been doing是什么时态

    ④特殊疑问句：特殊疑问词+一般疑问句（have/has+主语+过去分词+其他）现在完成时态可表示做完的事情以及已有的经验、但现在完成进行时不可以。在当代英语中，现在完成进行时有时也可用否定结构。如：Since that unfortunate...

  • have been doing是什么时态

    have been doing是现在完成进行时，表示从过去一直持续到现在，并且现在并未停止，还将持续到将来。have done现在完成时，到现在为止已经完成。 例句： I have been waiting for you for almost 2 hours. 我一直在等你，快两个小时了。 Where have you been hiding? 你都跑到哪去了？ Who has been making trouble? 是谁一直在捣乱

  • have been doing 是什么时态

    （1）定义：现在完成时用来表示现在之前已发生过或完成的动作或状态,但其结果却和现在有联系,也就是说,动作或状态发生在过去但它的影响现在还存在. I have had no money to spend now.(现在我没有钱花了.) Jane has laid the table.(简已经摆桌子.) Michael has been ill.(现在仍然很虚弱) He has returned from abroad. (现在已在此地)

  • had been doing是什么时态

    3、Until this summer, China had been doing that carefully.截止今年夏天，中国一直在审慎地这么做。4、I had been doing the work for two hours when the teache...

  • i would have been doing是什么时态

    i would have been doing是过去将来完成进行时，多用于虚拟句，i would have been doing意思是我现在本来应该做例如：If it wasnt because of you, I woul...

is been doing什么时态

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