I was wondering how to do past possessive?

Please help with these:

How was your trip?

This was my house.

Sam was your friend.

my try

 nice.

"Seyahatın nasıl geçti " would sound more natural.

There is no such thing as past possesive. There is possesive and past tense.

Thanks. It looks like there is no possessive past tense rather it is possessive + past tense to be. But can I say:?

Gezindı nasıl

No, it´s not possible to say like this.

Maybe this can help:

http://www.turkishlanguage.co.uk/tobepos.htm

How do I say: Thankyou for everything

Is it: Her şey için çok teşekkür

Many thanks for everything = Herşey için çok teşekkürler

Your attempt if translated to English would be

Many thank for everything (that is why you need the plural form, or to add the word etmek to make the noun teşekkür into a verb)

teşekkür etmek = to thank

teşekkür ederim = I thank (you)

I thought çok teşekkür was acceptable? Or just not with her sey?