文档介绍：（1）一般现在时
概念：经常、反复发生的动作或行为及现在的某种状况。
时间状语： always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,
基本形式（以do为例）：
第三人称单数：does（主语为非第三人称单数）；
肯定句：主语＋动词原形＋其他；
He works for us.
否定句：主语＋don‘t/doesn't＋动词原形＋其他；
He doesn't work for us.
一般疑问句：Do/Does＋主语＋动词原形＋其他。
肯定回答：Yes，（＋ 主语＋do/does）．
否定回答：No，（＋主语＋don't/doesn't.）
特殊疑问句：疑问词+一般疑问句语
Does he work for us?
Yes, he does.
No, he doesn't
What does he do for us?
He works for us.
（2）一般过去时
概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为。
时间状语：ago, yesterday, the day before yesterday, last week,last(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.
be动词＋行为动词的过去式
否定句式：在行为动词前加didn‘t，同时还原行为动词，或was／were＋not；
was或were放于句首；用助动词do的过去式did提问，同时还原行为动词
例如： Did he work for us?
He didn't work for us.
He worked for us.
（3）一般将来时
概念：表示将要发生的动作或存在的状态及打算、计划或准备做某事。
时间状语：tomorrow, next day(week, month, year…),soon, in a few minutes, by…,the day after tomorrow, etc.
am／are／is＋going to＋do 或
will／shall＋do
am/is/are/about to + do
am/is/are to + do;
一般将来时的表达方法
be going to +动词原形
be +不定式,be to+动词原形,be about to ＋动词原形
be able to +不定式
be about to+动词原形
will + 动词原形；
例如：He is going to work for us.
He will work for us；
He is 表达 将来