did you find the missing couple in the mountain yesterday?--no ,but we( )to getin touch withthem ever since.A.have tried b.have been trying 为什么选B B的时态是什么?A不对么?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/20 09:13:38
did you find the missing couple in the mountain yesterday?--no ,but we( )to getin touch withthem ever since.A.have tried b.have been trying 为什么选B B的时态是什么?A不对么?

did you find the missing couple in the mountain yesterday?--no ,but we( )to getin touch withthem ever since.A.have tried b.have been trying 为什么选B B的时态是什么?A不对么?
did you find the missing couple in the mountain yesterday?--no ,but we( )to get
in touch withthem ever since.
A.have tried b.have been trying 为什么选B B的时态是什么?A不对么?

did you find the missing couple in the mountain yesterday?--no ,but we( )to getin touch withthem ever since.A.have tried b.have been trying 为什么选B B的时态是什么?A不对么?
现在完成进行时 have been doing.
因为搜救工作持续到说话的时间点仍然在继续,但是搜救无果.

一种持续状态...不多解释...