题目内容：

用used to do sth造句2句话,然后变成疑问句、肯定句、否定句.

优质解答

He used to go home on foot.Did he use to go home on foot?He didn't use to go home on foot.She used to take a walk after supper.Did she use to take a walk after supper?She didn't use to take a walk aft...