aux.“can”的过去式;能够,打算;用于假设语气的条件句;用于虚拟语气的结论句;
例句:
If you'd given the job to me I could have done it in half the time.
你要是把活儿交给我,我早就做完了.
The cagey fox could not be easily trapped by the farmer.
那只狡猾的狐狸不会轻易落入农夫的陷阱.
No one could overtake him.
没有人能超过他.