精选优质文档-倾情为你奉上Unit 10 I ve had this bike for three years.Section A1. for +一段时间 表示动作持续一段时间,用于现在完成时2.keep （kept ; kept）保留用作系动词，保持（某种状态），其后常接形容词作表语。 Please keep quiet / silent! 请保持安静！ 用作实义动词(1)保管；保存；保留 Please keep these things for me while I am away. (2)赡养；饲养 I used to keep sheep in my childhood. (3)坚持；继续 接V-ing 形式作宾语。 If you keep practicing your spoken English, youll soon make great progress. (4)阻止；阻碍 keep sb/sth from doing sth 其中介词 from 不能省略 Th
