区别be used to.used to do (无内容)
used to do sth.表示"过去常做某事",其疑问句可直接把used提前,或加助动词Did(此 时应把used改为use)。否定句可用used not to do sth.or use(d)n't to do sth,or didn't use to do sth.如: Mother used to tell us stories when we were young.(MET88)在我们小时候,妈妈常给我们讲故事。 He didn't use to call on his grandpa after he found a job in a city.在城市工作后,他不再常去拜访他的祖父了。 be/get used to doing sth.习惯于做某事: