I am going badminton calss.
= I am going to badminton class

Some times I play bedminton with my friend.
= Sometimes, I play badminton with my friend.

And when there is a time I play game too.
Techer get a lesson to me.
= A teacher teaches me lessons

I am going badminton calss monday and thursday.
= I am going to badminton class on Mondays and Thursdays

It's fun and not tired.
= It's fun and not tiring

so I like badminton also I want to be a badminton player.