问题
选择题
I__________ you somewhere before, but your name has escaped me_________.
A.must see;for a moment
B.must have seen; for a moment
C.must see;for the moment
D.must have seen; for the moment
答案
答案:D
与不定式的完成时连用表示对过去发生的事持肯定态度的推断,在疑问句中用can,在持否定态度的推断时用can not。for a moment表示一个动作延续了一会儿,而for the moment则表示“目前;暂时”。