He often does some shopping at weekends.（对画线部分提问）

He often does some shopping at weekends.（对画线部分提问） My brother often watches cartoons at weekends（对画线部分提问） My mother often does some shopping at weekends改为否定 he often does some cleaning on weekends(对on weekends提问) My mother usually does some washing at weekends（对划线部分提问） He often (does his homework) on the computer.(对画线部分提问） She often does some shopping on weekends. jack often exercises on weekends.对画线部分提问! He likes to work in the evenings and at weekends.(对画线部分提问) he often does his homework at home 对often画线提问 My mother often does some shopping at the weekends.改成否定句怎么改? He cften watches TV on weekends.(对画线部分提问）（watches TV）