

Queria dois bilhetes para Lisboa.
Tenho dois filhos pequenos.
Queres dois pastéis de nata?
"dois" 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.