課本中不會教你的[W]715　when可以表示and then和at that time/moment

715　when可以表示and then和at that time/moment

◎ when有時可表示and then或at that time/moment，意為“這時突然，就在那時”，引導(dǎo)的從句要放在主句后。

He was just going out when the telephone rang. 他剛要出去，電話就響了。（=and just then）

She was walking down the road when she heard someone singing. 她正在路上走著，突然聽見有人在唱歌。（=and at that time）

He was reading a book when he saw a bird flying past the window. 他正在讀書，這時看見一只鳥從窗前飛過。（=and at that moment）

He left the army in 2001，when he went back to his hometown. 他是2001年退伍的，而后回了家鄉(xiāng)。