戴維做晚飯時(shí)燒傷了左手.（when）
When David was cooking,he burnt his left hand.
當(dāng)我正在看小說(shuō)時(shí),女兒睡著了.（while）
While I was reading a novel,my daughter fell asleep.
在晚會(huì)上,當(dāng)我們正在跳舞時(shí),他們?cè)诔?（while）
In the party while we were dancing,they were singing.
昨天開(kāi)始下雪時(shí),約翰正在超市購(gòu)物.（when）
When it began to snow,John was doing some shopping in the supermarket.
當(dāng)你敲門(mén)時(shí),我正在洗衣服.（when）
When you knocked at the door,I was doing some washing.
加油