She wants to do some cleaning on Saturday.(变为否定句) He has a lot of friend in this school.(加上do表示强调作用)

问题描述:

She wants to do some cleaning on Saturday.(变为否定句) He has a lot of friend in this school.
(加上do表示强调作用)

She does not want to do some cleaning on saturday.
He does not have a lot of riend in this school