was thinking
Estava pensando quantas línguas você fala.
I was wondering how many languages you speak.
Não sabia no que o Tom estava pensando.
I didn't know what Tom was thinking.
Eu já estava pensando que você não vinha.
I was already thinking you weren’t coming.
Eu sabia o que Tom estava pensando.
I knew what Tom was thinking.
Tom acabou não comprando o carro que ele estava pensando comprar.
Tom ended up not buying the car he had planned to buy.
Tom estava pensando nas crianças.
Tom was thinking about the children.