精选优质文档-倾情为你奉上第一部分 基础知识第一章 语 法第一节 时 态一一般现在时一般 + s; 在以ch, sh, s, x 或 o 结尾的词后 + es (teaches, goes, washes, fixes, guesses); 在以“辅音字母 + y”结尾的词后，变y为i后再加-es (studies, tries) 1. 表示现在反复发生的动作或存在的状态，常与every day, once a week, often, always, usually, sometimes, seldom等时间状语连用： -We go there twice a month. -Industrial buyers are responsible for supplying the goods and services that an organization required for its operations. (d. required - requires) 2. 表示主语的特征、性格、能力等：
