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三道关于非谓语和虚拟语气的题.英语

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三道关于非谓语和虚拟语气的题.英语
1.Why hasn‘t he come?_____on time,we would have to put off the trip.
A.if he doesn't come
B.if he won't come
C.if he shouldn't come
D.if he hadn't come
2.The studens will have more discussions like this in the weeks ______.
A.coming B.to come C.come D.to be coming
3.________ halfway through the exercise,the teacher changed his mind and collected all our papers.
A.When only being
B.When we were only
C.Being only
D.Having been
能不能说下答案并告诉我其他选项错在哪,或用了什么语法搭配.
三道关于非谓语和虚拟语气的题.英语
1D 主句是would加完成时,从句用过去完成时,表示对过去的虚拟
2B 属于非谓语,因为已经有了一个动词have,第二个动词要处理成非谓语,不定式表将来
3B ,如果选CD,那是两个动作有相同的主语,是老师既做试卷又收卷了,既然两个主句不同,就用状语从句 When we were only
再问: 后两个懂了,第一个答案是选C。。。
再答: 哦,我第一题看错了,would后面没有跟完成时,跟的是动词原形,表示的是对将来的虚拟 从句用should 加动词原形