一般现在时
表示经常发生的事情usually,often,every day,sometimes,always,never”等词.
例1:He usually takes a bus to school.
He sometimes takes a subway to school.
He never walk to school.
例2:she always swims.
she never swims.
she swims every day
2．现在进行时,
（1）表示正在发生的动作,通常有“now,look”.
（2）基本形式：be + doing
例1:I am swimming,now 我正在游泳
she is eating breakfast,now 她正在吃早饭
Look,she is singing 听,她在唱歌
3.一般过去时态
4．一般将来时