There is no light in the dormitory.They must have gone to the lecture_____There is no light in the dormitory.They must have gone to the lecture,_____?1.didn`t they4.haven`t they选4 为什么 1不可以啊?
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There is no light in the dormitory.They must have gone to the lecture_____There is no light in the dormitory.They must have gone to the lecture,_____?1.didn`t they4.haven`t they选4 为什么 1不可以啊?
There is no light in the dormitory.They must have gone to the lecture_____
There is no light in the dormitory.They must have gone to the lecture,_____?
1.didn`t they
4.haven`t they
选4 为什么 1不可以啊?
There is no light in the dormitory.They must have gone to the lecture_____There is no light in the dormitory.They must have gone to the lecture,_____?1.didn`t they4.haven`t they选4 为什么 1不可以啊?
前句用现在完成时态,反意疑问句中也要用相同时态
= =楼上讲的完全正确、所以我貌似没神马好补充的- -
must 表推测时,反意疑问句应与must后的动词为准。但如果有过去时间,用didn't
It must have rained last night, didn't it?