用when与while翻译

I saw a dog while I was on my way home/going home.
I saw a dog when I went home.

While I go to home,I had see a dog.

when：只能表示瞬间的动作。
while：即可以表示瞬间的动作，亦可表示长久的动作。

When I go home I saw one am the dog

I see a dog while i go home

when：只能表示瞬间的动作。
while：即可以表示瞬间的动作，亦可表示长久的动作。