高中英语经典句型归纳
1. be doing/ be about to do。be on the point of doing / had done…, when…(when：这时, 强调一个动作的突然发生)1). I was walking along the river, when I heard a drowning boy cry for help.
2). I was about to leave when it began to rain.
【下载】高中英语经典句型归纳作者: kobe 时间: 2013-7-11 18:30
