Afrikaans usually uses a double nie pattern for negation:
Die kind slaap nie in die motor nie.
So the sentence becomes The child is not sleeping in the car.
A simple way to think of it is:
For a yes/no question, Afrikaans usually moves the verb to the front:
Slaap die kind in die motor?
That means Is the child sleeping in the car? or Does the child sleep in the car?
So the difference is: