by heart
Tendo-o ouvido tantas vezes, posso recitar o poema de cor agora.
Having heard it so many times, I can now recite the poem by heart.
Tom sabia o poema de cor.
Tom knew the poem by heart.
Todos nós aprendemos o poema de cor.
We all learned the poem by heart.
Os estudantes foram instruídos a aprender o poema de cor.
The students were instructed to learn the poem by heart.