She is sitting in the back of the car.

Question

She is sitting in back of the car.

She is sitting in the front of the car.
She is sitting in front of the car.
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What is the difference between them?
Do we have to use 'the' or not?
Is she inside the car or ouside the car?
Can we use 'at the back of' instead of 'in back of' in this case?

Answer 1

In the back of the car - means that she is INSIDE the car.

In back of the car - means that she is sitting outside the car and behind it.

The same difference would apply to " in the front" and " in front of"

Actually we usually say, She is sitting in the back seat, or she is sitting in the front seat. (if the person is inside the car)

Answer 2

Thank you.
What about the following?

She is sitting at the back of the car.
She is sitting at back of the car.

Answer 3

She is sitting at the back of the car.... would mean that she is outside the car and is sitting in a chair or on the ground behind the car....

At back of the car is not used.