-Has the teacher finished marking the exam papers?-Sorry,I don't know.I just saw that he---(mark)them in the office yesterday .是填was marking还是marked可是yesterday是标志着前面的see是过去时,而且这是一个从句,不是一个
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-Has the teacher finished marking the exam papers?-Sorry,I don't know.I just saw that he---(mark)them in the office yesterday .是填was marking还是marked可是yesterday是标志着前面的see是过去时,而且这是一个从句,不是一个
-Has the teacher finished marking the exam papers?
-Sorry,I don't know.I just saw that he---(mark)them in the office yesterday .
是填was marking还是marked
可是yesterday是标志着前面的see是过去时,而且这是一个从句,不是一个短语,与see sb doing和see sb do没有关系吧~
-Has the teacher finished marking the exam papers?-Sorry,I don't know.I just saw that he---(mark)them in the office yesterday .是填was marking还是marked可是yesterday是标志着前面的see是过去时,而且这是一个从句,不是一个
was marking,强调过去那个时候正在进行.
是marked,因为前面是finished,从yesterday 也可以看出
固定搭配:see sb. do sth.和 see sb. doing sth.
所以此处填原形mark 或者 marking。结合选项再看看~!
是填was marking---------------