30．He looks as if he ______ a ghost. D A. sees B. seeing C. has seen D. had seen 选什么?
问题描述：
30．He looks as if he ______ a ghost. D A. sees B. seeing C. has seen D. had seen 选什么?
as if 后面不应该是过去式ma ?
答
D 他看起来就像看见了鬼,看见了,本来应该用现在完成时,但是看见鬼是不可能的所以要用虚拟语气,所以用过去完成时