[Grammar] correct preposition

[snoopya1984]

There are some curtains at the windows.
Is the preposition "at" correct?

Thank you

 

[Grumpy]

Yes.

 

[riquecohen]

I would probably say 'on.' (AmE)

 

[emsr2d2]

You will also hear "in" in BrE.

I have curtains up in two of my windows and blinds in the other three.

 

[5jj]

I would probably say 'on.' (AmE)

That sounds very strange to me, a speaker of BrE.

 

[Boris Tatarenko]

Hello.

It's pretty strange that in AmE we can hear "on" whilst "at" and "in" we can hear in BrE.

So, my question is:
If I write a letter (my exam) and I want to use sentence like that, what should I use exactly?

Anyway, I'd say "I have beautiful certains in my window". But my question is quit interesting.

 

[Barb_D]

That sounds very strange to me, a speaker of BrE.

No more so than "at the window" sounds strange to us.