Each student has his own dictionary. （形容词，定语）
Each has hi s good point. （代词，主语）
Our head teacher had a talk with each of us. （代词，宾语）
The students each have a desk. （代词，同位语）
The children can have a bag each. （，状语）
I know each number of your family.
I know every number of your family.
［误］There are many shops on every side of the street.
［正］There a re many shops on each side of the street.
［误］I gave a present to every one of her parents.
［正］I gave a present to each of her parents.
［误］I think every answer of the three is right.
［正］I think each of the three answers is right.
［误］I saw each was busy with his work.
［正］I saw everyone was busy with his work.