1、when的句子结构,常用于以下句型中：(1)主语 + be doing when (suddenly)意思是“正在做某事这时(突然)”;(2)主语 + be about to dowhen; 主语 + be on the point of (doing) when意思是“正要去做某事这时” (3)主语 + had just donewhen.某人刚做完某事时突然. (4)主语 + had hardly / scarcely /barely done when Hardly/Scarcely/Barely had +主语 + done when 一就,I was walking along th
2、e river when suddenly I heard a drowning boy cry for help. 我正在河边行走,这时我突然听到一个落水男孩求救. I was about to leave when it began to rain. 我正要离开,这时下雨了. I had just finished my exam paper when the bell rang,announcing the class was over. 我刚做完试卷,下课铃响了.,I had hardly got to the bus stop when the bus started. 我一到公共汽
3、车站，汽车就开了。 Hardly had I got to the bus stop when the bus started. no soonerthan I had no sooner got to the bus stop than the bus started. No sooner had I got to the bus stop than the bus started. As soon as I got to the bus stop, the bus started. 他一回来就买了一套房子。 （ no soonerthan ） He had no sooner returned than he bought a house. No sooner had he returned than he bought a house.,The moment, tne minute, the second, the instant on(doing) Immediately, instantly,
