coulda<口> = could have
couldaux.可以;能;可能;can的过去式
Could I have the check?
could you give us demo?
could not do anything about对 ... 毫无办法
could not do otherwise thanconj.只好
Could you work for SFX?
Could you do... ?
Could you make it mild?
Could I see the manager?
Could you manage Friday?
Could you treat my dental.请你治疗我的蛀牙。