短语词组短语be used to sthdoing sth 习惯于be used to donging sth 习惯做某事be used to doing sth 习惯做某事;习惯于;习惯于做某事;习惯于作某事be used to do sth 被用来做某事;被用来作某事;被用来做;被用于做某事 返回 be used to sth