Questions & Answers about Pociąg jest szybszy niż samochód.
How is the word szybszy formed?
Szybszy means "faster". It is the comparative form of the adjective szybki (fast). Because pociąg (train) is a masculine noun, the adjective takes the masculine ending -y. If we were comparing a feminine noun, it would be szybsza.
What case comes after niż in this sentence?
The noun after niż stays in the Nominative (dictionary) case here: samochód. That is because we are comparing two subjects. A helpful rule for niż is that the second item usually matches the case of the first item (pociąg).
Could I use od instead of niż to say "than"?
Yes! You can also say Pociąg jest szybszy od samochodu. But remember, if you use the preposition od, the noun that follows must change to the Genitive case (samochodu). Using niż is often easier right now because the noun can just stay in the Nominative case.