

A minha irmã tem dezanove anos.
O comboio parte às dezanove horas.
O teu quarto é o dezanove?
"dezanove" is in the lesson "Numbers" (Level 3), along with 19 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.