一般现在时:I usually / always /seldom ……do sth(something)
现在进行时:I am /He is She is/It's…… doing sth 【I am /He is She is/It's……后面加的是动词+ing】
一般将来时:I will / I am going to /I plan to…… do sth。( will/be going to /plan to是有区别的be going to 和plan to是有认真考虑过的,will只是临时之意 ,但小学应该不会那么讲究,考的那么细)