yes they may have done 为什么不能用can
yes they may have done 为什么不能用can
Have they watered the flowers______ Yes,they have done it___
Has anyone called the police?为什么能用Yes,they have回答?
有must/could/can/may/maight have been done吗
they have done everything they can ___the man's life
can have done 和may have done 也可用在过去时态里面吗?
Have they watered the flowers ____?Yes,they have done it___
"Could you help me with my lessons?""Yes I can."中为什么不能用could
"Could you help me with my lessons?""Yes I can."中为什么不能用cond
what can i do for you?为什么不能用yes please来回答
Could I call you by your first name?Yes,you ( ) 为什么用may而不能用m
may have done might have done区别