in the front of the car but at the front of the train, plain?

[mrwroc]

Am I right?

I sat in the front of the car.

but

I sat at the front of the train.
I sat at the front of the plain.

 

[Rover_KE]

If you mean 'plane', yes.

 

[mrwroc]

I just found: "We asked to sit in the front of the plane."
My theory collapsed. Can I change the above sentence to: "We asked to sit at the front of the plane."?

 

[jutfrank]

Your theory doesn't have to collapse under the feeble weight of one counterexample. The speaker ought to have used at in that sentence.