◎ when有時(shí)可表示and then或at that time/moment,意為“這時(shí)突然,就在那時(shí)”,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(tīng)見(jiàn)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(shū),這時(shí)看見(jiàn)一只鳥(niǎo)從窗前飛過(guò)。(=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)。