Question

you ate the cake I left forma negativa e interrogativa

Answer 1

Interrogativa: Did you eat the cake?
Negativa: You didn't eat the cake

Não usa I left, pois significa eu esquerda

Você tem que usar o acompahante Do, mas no passado usa-se did e na forma negativa didn't

Espero que tenho ajudado

Answer 2

DID YOU EAT THE CAKE?
YOU DIDN'T EAT THE CAKE

DID I LEAVE?
I DIDN'T LEAVE