一般现在时
1、概念:表示经常发生的情况;有规律出现的情况;总是发生的;事实真理。
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.—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: @lt 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。
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.
3.基本结构:主语+动词的过去式或be的过去式+名词
4.否定形式:主语+was / were+ not+其他;在行为动词前加didn't，同时还原行为动词。
5.一般疑问句: 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。
eg: @She often came to help us in those days.那些天她经常来帮助我们。②l didn't know you were so busy.我不知道你这么忙。
一般过去将来时
1.概念:立足于过去某一时刻，从过去看将来，常用于宾语从句中。
2.时间状语:The next day (morning, year...), the following month (week.….), etc.
3.基本结构:主语+was / were +going to +do+其它;主语+would / should +do+其它
4.否定形式:主语+was / were +not +going to +do+其它;主语+would/should+not+do.
5.—般疑问句: was 或 were放于句首;would / should提到句首
eg: @He said he would go to Beijing the next day.他说他第二天要去北京。②l asked who was going there.我问，谁要去那里。
现在进行时
1.概念:表示现阶段或说话时正在进行的动作及行为。
2.时间状语:Now, at this time, days, look, listen, etc.
3.基本结构:主语+be+ doing+其它
4.否定形式:主语+be+ not+ doing+其它
5.一般疑问句:把be动词放于句首。
eg: ①Are you feeling good today?你今天感觉如何?He is doing well in his lessons.在课上他表现得很好。
