Her mather lived in the big house alone before同义句

题目

Her mather lived in the big house alone before同义句
Her mather（）（）（）in the big house（）（）before
The conference was held four weeks ago同义句
The conference（）（）four weeks ago现等求大神

答案

Her mather lived in the big house alone before同义句Her mather（has）（been）（living）in the big house（by）（herself ）beforeThe conference was held four weeks ago同义句The conference（was）（had ）...