How to use contraction

How to use contraction doesn’t, don't , isn't  and  aren't.

These are both contraction:
Does+not   = doesn't
Do+not =  don't
Doesn't is used when speaking of one individual, place or thing.
A it has a trend of fallen in a sentence of asking.
Doesn't  the car fix from yesterday ?

Don't is used when speaking of more than one individual , place, or thing.
Don't the boys like ice-cream too?

We also use don't with the words I and you.
I don't like rice and meat.
You don't like fish and rice.

Isn't is used when speaking of one person, place or thing.
The rain isn't falling hard.

Aren't is used when speaking of more than one person, place or thing.
Those boys aren't playing a good game.

We also used aren't with the word you, whether it stands for one person or even more than one.
"You aren't the worst player here mark." Tony said.

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