动词不定式的被动式（来自百度百科）The chair looks rather hard,but in fact it

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动词不定式的被动式
（来自百度百科）
The chair looks rather hard,but in fact it is very comfortable to ___.A.sit B.sit on C.be seat D.be sat on B.如果不定式为不及物动词,其后应有必要的介词.当动词与介词连用时,常位于"形容词+动词不定式"结构的末尾.
我还是不明白为什么要选B而不选D.
三楼说的挺懂的。可以把你的Q给我吗？

用被动式还是主动式得看逻辑主语是什么,你这个句子中的逻辑主语是人,为什么?因为形容词用了comfortable,会觉得舒服的当然是人了.既然逻辑主语是人,那么后面的动词也就是人执行的,所以是主动的坐,用sit.对比一下这个句子：It’s an honour to be invited to the ceremony.会觉得honour的当然还是人,不过这个时候这个人是被邀请才觉得荣幸,所以要用被动了.

动词不定式的被动式（来自百度百科）The chair looks rather hard,but in fact it The chair looks rather hard,but in fact,it is very comfortab The chair looks rather hard , but in fact , it is very comfo The chair looks rather hard,but in fact it is very comfortab the chair looks rather hard ,but in fact it is very comforta 5．The chair looks rather hard,but in fact it is very comfort The chair looked rather hard,but in fact it is very comforta This kind of chair looks hard ,but in fact it is comfortable The chair looks very old,but in fact it is very confortable The bed looks rather old,but in fact it is very comfortable 什么叫主动表被动The chair looks very hard,but it is very comfortable 英语题目请详细讲解,请说明原因,最好扩展的讲1.The chair looks very hard ,but it is