疑问:did sb use to do sth 否定sb didn't use to do sth
疑问:be(am is are were was) sb used to doing sth
否定:sb be not used to doing sth.(be随人称合数的变化而变化)
疑问:did sb use to do sth 否定sb didn't use to do sth
疑问:be(am is are were was) sb used to doing sth
否定:sb be not used to doing sth.(be随人称合数的变化而变化)