must have working hard与must have been working hard的区别
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must have working hard与must have been working hard的区别
Mary ___on her new priject late last night ,so she felt sleeply in the office this morninga.must work b.must have been working c.must be working d.must have been worked选什么.
he () tired now after working for ten hours have to need must would
The elder brother must know,ha ha,sister you
must have
the boy are sweeting all over.they must have been working 这句话怎么翻译,为什么用完成进行时
he didn't come yesterday,he ______busy working in the lab怎么选must have been?.3Q
if i had six oranges in one hand and seven applesin the other,what must i ha急If I had six oranges in one hand and seven apples in the other,what must I have?翻译并回答~
have been working 是什么时态
must have been done must have done
must have/ must have been的区别
You ( )be tired .you have only been working for an hour.A.must B.wont C.cant D.may not
If you keep working hard and make more progress,you ____ have an opportunity to travel during the summer holiday.A shall B must C need D dare
25.He got up so late in the morning so he ___________ working late at night.A.could have been B.must have been C.should have been D.would have been
must,have to,have got
must/have to造句
must have to区别
must not have