现在完成时时态问题the friendly relations and cooperation between our tow countries have been enhanced in the past few years上面的句子现在完成时的时态用的对吗?请指教下~是用have吗?不是has啊?还有we have had four tex

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现在完成时时态问题the friendly relations and cooperation between our tow countries have been enhanced in the past few years上面的句子现在完成时的时态用的对吗?请指教下~是用have吗?不是has啊?还有we have had four tex
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现在完成时时态问题the friendly relations and cooperation between our tow countries have been enhanced in the past few years上面的句子现在完成时的时态用的对吗?请指教下~是用have吗?不是has啊?还有we have had four tex
现在完成时时态问题
the friendly relations and cooperation between our tow countries have been enhanced in the past few years
上面的句子现在完成时的时态用的对吗?请指教下~是用have吗?不是has啊?
还有
we have had four texts this semester
这个句子里面的have had这样连着再好多句子中出现 什么时候have had连起来这样用?

现在完成时时态问题the friendly relations and cooperation between our tow countries have been enhanced in the past few years上面的句子现在完成时的时态用的对吗?请指教下~是用have吗?不是has啊?还有we have had four tex
we have had four texts this semester
这句话的中的have had是用在现在完成时.而现在完成时的结构是have/has+过去分词.这句话翻译出来就是（这学期我们有4种文本）.这样这句话就好理解了.have是过去完成结构的一部分,而had就可以翻译为“有,拥有”.所以have had就好理解了.

宾语从句时态问题Have you decided (how you will help) the che children in the poor area?为什么主句是现在完成时,从句用的是将来时? 英语动词时态:现在完成时 现在完成时的时态标志. 什么是现在完成时被动时态 现在完成时的时态标志 before时态问题before时态用于什么时态,具体地.可用在过去式和现在完成时?举例详细地说下 1个高中水平的英语时态问题1.Worried about the journey, I was unsettled for the first few days.这里的时态是不是错的? for the first few days 不应该用现在完成时吗? 现在完成时是现在时态还是过去时态 现在完成时所用的动词时态是什么时态? 现在完成时时态问题the friendly relations and cooperation between our tow countries have been enhanced in the past few years上面的句子现在完成时的时态用的对吗?请指教下~是用have吗?不是has啊?还有we have had four tex 像现在完成时一样的时态 英语时态变化问题!he then filled a cup with some of the petrol some of the castor oil and some of the vinegar 变过去完成时,还有现在完成时,过去将来时,被动变主动和主动变被动 . 请解释一下这个句子的时态问题It has found that the highest scores on vocabulary tests have been made by people getting the highest pay.为什么用了两个现在完成时?has found 和have been made in the past year用什么时态123现在完成时还是一般过去时 是year by the time 后面接什么时态时主句是用现在完成时?例子? by the age of 30 后面用过去完成时还是现在完成时,还是别的时态? It during the past five years用change a lot 什么时态 是一般过去时还是现在完成时 the evening when we should have been asleep1 2 这是什么时态 现在完成时吗?