by now用什么时态

Question

如题所述

Answer 1

by now 到目前为止，用现在完成时，如， We have learned English for ten years by now

Answer 2

by now是现在完成时的标志，另外还有so far，till/until now,up to now。都使用现在完成时。By now you will have guessed that I'm back in Ireland.你现在应该已经猜出我回到了爱尔兰了。

by now到目前为止；到如今；到现在为止；直到如今，语气平淡，只是单纯的叙述这件事，可用于多种时态。

例如：He would have been there by now if had not missed the train.

如果不是误了火车的话，他现在应该已经到那里了。