Questions & Answers about Ten nowy samochód jest lepszy.
What is the base dictionary word for lepszy?
The base word for "good" is dobry. Just like in English where "good" changes to a completely different word ("better"), Polish does the same thing. The comparative form of dobry is the highly irregular word lepszy.
Why do the adjectives nowy and lepszy both end in -y here?
They both describe samochód (car), which is a masculine noun. Because samochód is the subject of the sentence, both the regular adjective (nowy) and the comparative adjective (lepszy) take the standard masculine subject ending -y.
Why are we using ten instead of to for "this"?
How would lepszy change if we were talking about multiple cars?
Comparative adjectives follow the exact same agreement rules as regular adjectives. If you changed the sentence to "These new cars are better," you would use the standard plural ending -e for non-human objects: Te nowe samochody są lepsze.