Výtah v našem domě je starý, ale dobrý.

to be

Breakdown of Výtah v našem domě je starý, ale dobrý.

• dobrý: good
• dům: the house
• v: in

Questions & Answers about Výtah v našem domě je starý, ale dobrý.

Why is it v našem domě and not v našem dům?

Because the preposition v (“in”) normally takes the locative case in Czech.

• The basic form (nominative) of the noun is dům (“house”).
• The locative singular of dům is domě (“in the house”).

So:

• náš dům = our house (subject, nominative)
• v našem domě = in our house (locative, required by v)

The possessive náš must also change to the locative masculine singular form našem to agree with domě:

• nominative: náš dům
• locative: v našem domě

How do I know that výtah is masculine, so the adjectives are starý, dobrý?