I couldn’t possibly have finished such a long book in such a short time.

我想知道，为什么用 have finished ，而不用finish？

I couldn't agree more i couldn't see you I couldn't agree more. 英译汉 I couldn't agree more. However hard I tired I still couldn’t manage it. I couldn’t agree _____________with your excellent choice of friends I couldn’t agree _____________with your excellent choice of friends. i couldn't agree with you more i couldn't help over hearing your conversation why couldn't I switch the imputing form?