1.could I use your dictionary?A ,yes you could.B ,yes,I can.C ,Sorry.I am using it .

问题描述:

1.could I use your dictionary?A ,yes you could.B ,yes,I can.C ,Sorry.I am using it .
D ,NO,you couldn't.

c 同时肯定回答可用 yes,you can 否定no,you can`t
could 表示委婉语气而不是过去时