题目内容
13.Wehave not seen(not see) him since last Monday.分析 我们自从上周一就没有见过他.
解答 答案是have not seen.本题考查语境中选用恰当的动词时态.since表示"自从过去某一时间开始到现在",是与现在相联系的段时间,需要与现在完成时连用,故答案是have not seen.
点评 本题是要求用所给动词的适当形式填空,解题时首先考虑句中需要的是谓语动词还是非谓语动词;其次,如果是谓语动词关注时态、语态和数的变化;如果是非谓语动词要联系非谓语的基本用法判断非谓语的形式.
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