you can eat
Se quiser, pode comer o resto do bolo.
If you want, you can eat the rest of the cake.
Tom não pode comer carne de porco.
Tom can't eat pork.
Pode comer meu pedaço de bolo se quiser.
You can eat my piece of cake if you want.
Tom pode comer o tanto que quiser.
Tom can eat as much as he wants.