英语八大时态表 时态结构常连用的词主要用法例句一般现在时1 be动词主+am/is/are +名词形容词介词Often , usually,every day, sometimes;always, never;once/twice/aweek/year;on Sundays/Mondays/.;一般现在时表示没有时限的持久存在的习惯性的动作或状态，或现阶段反复发生的动作或状态陈述句： I am an office worker. He is so lazy. They are at home now.否定句： I am not Tim.She is not very beautiful.They are not in the office.一般疑问句：Are you an office assistant? Is she beautiful?2 行为动词（1）主+V原形+其他（2）主+V-s/es+其他（3）疑问句和否定句，用do或don
