题目内容
12.-Could you go to buy some salt for me,Vince?-I'd love to,Mum,but I ________ my homework.( )
A. | do | B. | did | C. | am doing | D. | was doing |
分析 -威尼斯,你能去给我买些盐吗?
-非常愿意,妈妈.但是我正在做作业.
解答 答案:C 根据"妈妈的问句"可知,此句用现在进行时态;现在进行时态表示现在正在进行动作,其构成形式是助动词"be+动词-ing".此题主语是第一人称,时态be动词用am,故选C.
点评 判断动词的时态,要通过所给的时间状语、提示词或语境去判断动词存在的状态;此句属于语境提示.
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