

Esta garrafa é muito útil no verão.
Um termo é útil para levar chá.
Achas que esta máquina de café é útil?
"útil" is in the lesson "Drinks" (Level 40), along with 11 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.