They have been studying since his mother left this money对since his mother left this money提问怎摸

Some students study Russian in the school.They have been to_________ Where have they been? They have a____ been there How mang ( )(study) do they ( )(have)? what have they been doing 是什么时态 What places have they been?怎么翻译? where have they been?是现在完成时吗? they have been in kate's for they have been the subject of debate they have been acting up more lately they have been there before.so have i they have been there before.(),() 改为同义句 They have been here once.把been换成came怎么样 they said they have been married for ten years They have study English for four years.有什么错 they have to study a lot ,________?反疑问句是什么? They have never been opened.为什么不可以是They never have been opened. they have been here since 1988,对1988进行提问,（）（）have they been here? They have been friends for 6 years. 改为同义句 They have been friends _______ _______.