From Duolingo:

• ez a vonat – this train
• ezek a vonatok – these trains
• ezzel a vonattal – with this train
• ez alatt a vonat alatt – under this train
• ez a vonat – this train
• Ez vonat. – This is a train.
• Ezek vonatok. – These are trains.
• Ez a vonat. – This is the train.
• Ezek a vonatok. – These are the trains.