when等於什麼

when等於：what time

The film was already on when we arrived .我們到時，電影已經開演了。

When two tigers fight ， one is sure to lose ...兩虎相爭，必有一傷。

When are you coming over to see us again 你什麼時候再來看我們呢

Plastics will soften when exposed to heat .塑料適當加熱就可以軟化。

When is he dejected or melancholy ?什麼時候他才會感到失意或悲傷呢

When a car is out of gear it cannot run .汽車脫檔後，就不能開動了。