作业帮一道英语时态单选题--do you know whether jim has finished his report?-
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一道英语时态单选题
--do you know whether jim has finished his report?
--no. but he ___ it till early in the morning
A. was writing B. had been writing
--do you know whether jim has finished his report?
--no. but he ___ it till early in the morning
A. was writing B. had been writing
B.过去完成进行时是由had+been+v-ing构成,表示的是从“过去的过去”这个时间点开始一直进行到“过去”这个时间点,early in the morning是过去的时间,所以写作业这个动作应该是在这之前就开始,也就是说是从“过去的过去”开始一直进行到早上,所以,我认为答案应该是B
一道英语时态单选题--do you know whether jim has finished his report?-
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