a. ( ) I could to dance when I was 2 years old. ( ) I could dance when I was 2 years old. ( ) I could dancing when I was 2 years old. (Eu poderia dançar quando eu tinha 2 anos)
b. ( ) My friend couldn’t riding a bike. She was ill. ( ) My friend couldn’t not ride a bike. She was ill. ( ) My friend couldn’t ride a bike. She was ill. (Minha amiga não poderia andar de bicicleta. Ela estava doente.)
c. ( ) We could travel if we had money. ( ) We could travelling if we had money. ( ) We could to travel if we had money. (Nós poderíamos viajar se tivéssemos dinheiro.)
d. ( ) Ted could walk when he was a year old. ( ) Ted could walk when he was a year old. ( ) Ted could to walk when he was a year old. (Ted poderia andar quando ele tinha 1 ano.)