has been to\in在什么情况下才省掉介词
has been to\in在什么情况下才省掉介词
have,has,have been,has been在什么情况下用啊?
英语方位问题north,south,east,west用什么介词我知道有三个介词in,at,to不知道在什么情况下用!
在什么情况下,用什么介词
介词 on在什么情况下使用?
各种介词在什么情况下使用?
he has already been to erery country of in the word.这里面的介词to
现在完成时have/has gone to,have/has been to,have been in有什么区别
He has been to Beijing和He has been in Beijing有什么区别?
He has been to China in 2003有什么错?
that place is in the south of the city其中介词用in 为什么,在什么情况下用on,
英语中to什么情况下是介词,什么情况下是不定式标志