一、 一般现在时：
1.概念：经常、反复发生的动作或行为及现在的某种状况.
2.时间状语：always, usually, often, sometimes, every week (day, year, month...), once a week, on Sundays,
3.基本结构：动词 原形 （如主语为第三人称单数,动词上要加（e）S）
4.否定形式：am/is/are+not;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,通常还原行为动词.
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.
6.例句：It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
二、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, these days, etc.
3.基本结构：am/is/are+doing
4.否定形式：am/is/are+not+doing.
5.一般疑问句：把be动词放于句首.
6.例句：How are you feeling today?
He is doing well in his lessons.
三、一般将来时：
1.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.
2.时间状语：tomorrow, next day(week, month, year…),soon, in a few minutes, by…,the day after tomorrow, etc.
3.基本结构：am/is/are/going to + do；will/shall + do.
4.否定形式：was/were + not; 在行为动词前加won’t,同时还原行为动词.
5.一般疑问句：be放于句首；will/shall提到句首.
6.例句：They are going to have a competition with us in studies.
It is going to rain.
希望能够帮到你!