

A minha avó está sempre a cantarolar enquanto cozinha.
Ele cantarolava uma música antiga no duche.
Podes parar de cantarolar? Estou a tentar estudar.
"cantarolar" is in the lesson "Verbs 12" (Level 24), 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.