1 、used to 过去 一定： S + used to + do（动词原型） 否认： S +didn ’t+use to + do 疑问： Did + S + use to + do 2、 主问句：①疑问词 who( 人)/what( 物 ) ②抄（无助动词） 宾问句：①疑问词 who/what ②助动词 do(动原 ) does(三单 ) did(过去 ) ③ 动原 He bought a book. Who bought a book? What did he buy? 3、反身代词 ①某人自己 Am / is / are Was / were Been ②五单三复 Myself yourself himself herself itself Ourselves themselves yourselves ③主语 / 宾语（人称和单复数） 决定反身代词 ④ by + 反身代词 4、形 / 副词 ①形名动副 / 系形副形 ②形变副 1. + ly 2. y 变 i +ly 3.le 变 ly 4.特别不变 fast, hard, enough, early, late,straight,high,far 本文来源：https://www.wddqw.com/doc/14dd4036b7daa58da0116c175f0e7cd185251846.html