How much time has we left?为什么是用has?而不是用have呢?

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• 现在完成时 he was born in 1986.born 现在完成时前面不是用have has 为什么是was呢?
• 高中英语单选几则DO you feel like waking there or taking a bus?I would like to walk.Since there is not much time left,I would rather we ----- a taxiA TAKE B TOOK解释是虚拟语气,为什么要用虚拟语气,没有时间不是事实吗?又不是假设状况,为什么要虚拟?难道是因为类似建议所以用虚拟?------that i was a regular visitor,the servant let me inA Seeing B Having seen有先后顺序不就要用完成时吗?这里肯定动作有先后,不要跟我说这里不强调先后哦,那我真的就晕头了,我怎么判断是否强调先后啊.Where did you get to know her?It was on the farm ----we workedA that B where单看下一句,如果我把that填进去,是形式主语呢还是强调句呢?
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• 几道英语选择题中考的.I hear Sam has gone to Qiandiao for his holiday.--Oh,how nice!Do you know when he_______?A.left B.was leaving C.has left D.had left为什么用left 而不用 其他时态2 Jim dislikes people ______talk much but never do anything .A.who B.whom C.whose为什么不选whom
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• 9.Unfortunately,when i dropped in ,proffesor smith( ),so we only had time for a few words.A.has just left B.has just leftC.just left D.was just leavingQ:have 时间发生在什么动作之前,是leave之前吗?用过去完成事态had+done,其参照点(过去的那个动作)不一定就用一般过去时态,还可以用哪些时态喃?最好有例句说明,thank you D 写掉了 我主要想问 为什么题中是so we only had time for a few words,里要用过去完成时态.
• Exposed in the sun for a long time,the door of those poster has gone.Being exposed in the sun for a long time will have bad effects on us.这类句子英语老师说句子中间有逗号开头用ed,无逗号用ing是怎么回事?为什么有的句子又不是这样的,很疑惑啊
• 英语：No matter how I tried,it was impossible to fill this beautiful pen with ink and to this dayNo matter how I tried,it was impossible to fill this beautiful pen with ink and to this day it has never written a single word这里为什么是written而不是用wrote呢?
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