助动词的四种分类及具体形式如下:
1、第一类是do(does),用于一般现在时。例如:
Do you often watch TV on the weekend?
2、第二类是be,用于现在进行时和被动语态。例如:
I am reading a novel.
She is allowed to have a rest now.
3、第三类是will,用于一般将来时态。例如:
I will go to zhoushan next week.
4、第四类是have,用于现在完成时。例如:
I have done my homework.