cuold要比can来的委婉.比如说:Could you please pass me the teapot over there?
还有就是表示过去拥有的能力(即使现在会有时也得用could)例:What was you in college?
I was the monitor,and I also could drive a car.
cuold要比can来的委婉.比如说:Could you please pass me the teapot over there?
还有就是表示过去拥有的能力(即使现在会有时也得用could)例:What was you in college?
I was the monitor,and I also could drive a car.