They have been studying since his mother left this money对sin

They have been studying since his mother left this money对sin 对括号内内容提问They have been here since （this morning）They have be I have been studying English since I was five (对since I was I have been studying English since I was five (对化线部分提问) l have been studing here since my mother left me last year( they have been here since 1988,对1988进行提问,（）（）have they been We have been studying english since we move here l have been studying for the test since last night They have been here since 2000.划since 2000.（对划线提问）____ ____h they have been here since 2000 英语翻译1.They have been here(since 2000).  对括号内提问________ They have been here since 2000 （对划线提问）线在2000下,求回答,