Question

quando usamos o ''when'' e o ''while'' ?

Answer 1

When is your birthday? when --> quando 

while se usa para designar uma ação realizada no mesmo tempo que outra por exemplo: 

I was drinking beer while my dog was running in the house while --> enquanto 

Answer 2

When = Quando e While = Enquanto

Exemplo : I was going home when my cellphone rang. ( Eu estava indo para casa quando meu telefone tocou)

Exemplo2 : While I was watching TV, He was cooking. ( Enquanto eu assistia TV, ele cozinhava).