Anne is said to _________ in Africa ,and she will come back next _英语解答

Anne is said to _________ in Africa ,and she will come back next month
A do research
B be doing research
C have done research
D have been doing research
我想问为什么不选D
过去完成进行时,就是相对过去的某个时刻来说已经对现在有直接影响并且还在进行的动作吗

人气：404 ℃　时间：2020-05-20 01:07:04

解答

答案是 B be doing research这是动词不定式的进行形式作主补表示主语正在做某事根据句子意思应该选B选项 A do research是动词不定式的一般形式作主补表示主语将要做某事选项C have done research是动词不定式...