以前他晚饭后经常散步He ___ ___ ___a walk after supper
问题描述：
以前他晚饭后经常散步He ___ ___ ___a walk after supper
答
He _used__ _to__ _take__a walk after supper
答
以前他晚饭后经常散步 He _often__ _goes__ __for_a walk after supper
答
used to take 过去经常 用used to do sth