2.时间状语: Always, usually, often, sometimes, every week (day, year, month…), once a week (day, year, month…), on Sundays (on Mondays…), etc.
3.基本结构：主语+动词原形（如主语为第三人称单数，动词上要改为第三人称单数形式）
4.否定形式：主语+am / is / are+not+其他；此时态的谓语动词若为行为动词，则在其前加 don't，如主语为第三人称单数，则用 doesn't，同时还原行为动词。
5.一般疑问句：把 be 动词放于句首；用助动词 do 提问，如主语为第三人称单数，则用 does，同时，还原行为动词。
eg：①It seldom snows here. 这里很少下雪。②He is always ready to help others. 他总是乐于帮助别人。③Action speaks louder than words. 事实胜雄辩。
二、一般过去时
1.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。
2.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.
eg：①We had hoped that you would come, but you didn't. 那时我们希望你能来，但是你没有来。
②I had hardly opened the door when he hit me. 我刚打开门，他就打了我。（注意：had hardly… when... 刚......就......）
③He had no sooner bought the car than he sold it. 他刚买了这辆车，转眼又卖了。（注意：had no sooner…than 刚…… 就……）