When & while

While playing cricket, they started fighting.

He met my friend while he was shopping.

The phone was ringing while I was watering the plants.

Just for awhile (for few times)

Note: use at long time action.


I claimed that tree when I was in school.

I was sleeping when you came here.

I saw a cat when I was open the door.

I don't remember when I gave that pen to you.

When did you come?

Note: short time & question