现在完成时中的 twice once等等 是用how long 还是how ofen we have been to c
现在完成时中的 twice once等等 是用how long 还是how ofen we have been to c
:()have your parents been abord?only once A,how ofen B,how m
How long have you been waiting?how long 这里是做 时间状语,还是宾语
How long have you been to department
How often have you been to Beijing?Twice
how long have you___beijing?A gone to B been to C been in D
I have been to Beijing twice 为什么用现在完成时
现在完成时How long后.加持续性还是瞬间性动词,如How long have you( )here?是填lived
How long have you been for china与How long have you been in c
"How long have you been
how long have you had to wait?had 如果是现在完成时,wait为什么不加ed,
how long have you been in与how long have been to的区别,还有how lon