Learn Polish: Moje auto jest stare.

In Polish, words like "my" have to match the gender of the noun they belong to. The word auto is a neuter noun because it ends in 'o'. Moje is the neuter form of "my", while mój is for masculine nouns and moja is for feminine nouns.

Why does the adjective stare end in 'e'?

Just like the word "my", adjectives must match the gender of the noun they describe. Because auto is neuter, the adjective takes the neuter ending -e to become stare. If you were describing a masculine noun, it would be stary, and for a feminine noun, stara.

I usually see samochód for "car". Can I use that instead of auto?

Yes, both words mean "car" and are used all the time. Auto is a bit shorter and more casual, while samochód is the standard word. Just remember that samochód is a masculine noun! If you swap it in, you have to change the other words to match its gender: Mój samochód jest stary.

Does the verb jest change depending on the gender of the noun?