When I went out, it was raining.
(dışarı çıktığımda yağmur yağıyordu.)
It was raining when I went out. (yukarıdaki cümle ile aynı anlamda.)
Eğer When cümlenin başında kullanılırsa, ikinci yargıyı bildiren cümle "," virgülle ayrılır.
When you're tired, don't drive.
Don't drive when you're tired.
(Yorgun olduğun zaman araba sürme.)
Ayşe was very happy when she passed her exam.
When Ayşe passed her exam, she was very happy.
(Ayşe sınavını geçtiğinde çok mutluydu.)
Yukarda söz ettiğim kural "before, while, after" için de geçerlidir.
Always look both ways before you cross road.
Before you cross the road, always look both ways.
While I was waiting for the bus, it began to rain.
It began to rain while I was waiting for the bus.
He never played football again after he broke his leg.
After he broke his leg, he never played football again.