Lily always helps her mother_____(介词）the housework

Lily always helps her mother_____(介词）the housework He often helps his mother_____ the housework Lily always helps her mother _______（clean）the house. He often helps his mother_____ the housework,but he never___ Peter always()his mother()the housework. A.helps, Linda often helps her mother do the housework.（改为同义句） He ofthen helps her mom do the housework.（同义句） Mary often helps her mother ____(do） the housework after sch she helps her mother do the housework 的同义句? she helps her mother do the housework(改为否定句) often helps her mother do the housework同义句 She helps her mother do the housework.(改为同义句)