19.I didn't hear the phone .I ______asleep .19.I didn't hear the phone .I ______asleep .A.must be B.must have been C.should be D.should have been 选B为什么为什么不选A
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19.I didn't hear the phone .I ______asleep .
19.I didn't hear the phone .I ______asleep .
A.must be
B.must have been
C.should be
D.should have been
选B为什么
为什么不选A
B我一定是睡着了刚才.must表示一定
must have been 这里不是现在完成时,因为must后必须用动词原形,所以不用had been,这里表示我之前一定睡着了.
be asleep 入睡
我没听到电话,准是睡着了。
must have been 表示 猜测过去肯定做某事 这是一个重要的语法 过去完成时
你要注意看 第一句有个didn't 代表过去 这个词表示你要用过去时 而且 这句话的意思是我那时肯定睡着了 措意用过去完成时但选项是现在完成时啊我想问下 must 过去时是啥...
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must have been 表示 猜测过去肯定做某事 这是一个重要的语法 过去完成时
你要注意看 第一句有个didn't 代表过去 这个词表示你要用过去时 而且 这句话的意思是我那时肯定睡着了 措意用过去完成时
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过去式啊!
19.I didn't hear the phone .I ______asleep .19.I didn't hear the phone .I ______asleep .A.must be B.must have been C.should be D.should have been 选B为什么为什么不选A
I didn't hear from him
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