2015年高考备考：高考英语必备句型20个汇总[2]

句型15

when引导的从句

when除了用来引导主语从句、宾语从句、时间状语从句、表语从句和定语从句，还有一种用法值得关注，那就是when引导并列分句，意思是“这时突然;就在那时”，强调另一个动作的突然发生。常用于以下句型中：(1)、主语 + be doing… when…意思是“正在做某事这时……”;(2)、主语 + be about to do…when…;(3)、主语+be on the point of (doing) …when…意思是“正要去做某事这时……”

[例句

One day Chuck was on a flight across the Pacific Ocean when suddenly his plane crashed. 有一天，Chuck正在太平洋上飞行，这时他的飞机突然爆炸了。

I don’t know when he will arrive. 我不晓得他什么时候到达。

I thought of the happy days when I was in Beijing. 我想起了在北京时的那段快乐日子。

I believe the time will soon come when there will be no weapons in the world. 我相信世界上没有武器的日子不久就会到来。

I was walking along the river when 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. 我刚要离开，这时下雨了。

I had just finished my exam paper when the bell rang, announcing the class was over. 我刚做完作业，下课铃响了。

I thought of the happy days when I was in France. 我想到了在法国时那段快乐日子。

I believe the time will soon come when there will be no weapons in the world. 我相信世界上没有武器的日子不久就会来临。

[比较

I was walking along the street when I caught sight of a tailor’s shop. 我正在街上走，这时我看见一家裁缝店。

I was walking along the streets. Just at the moment I caught sight of a tailor’s shop. 我在街上走。就在那时我看见一家裁缝店。

句型16

while引导的从句

while除了有“当/在……时候”的意思外(注意：引导的句子谓语动词只能是延续性动词!)，另外的两层意思也是考查的重点：(1)while = although “尽管”、“虽然”，引导让步状语从句;(2)while的意思是“然而;可是”，常用来表达对比关系。

[例句

While I admit that the problem is difficult, I don’t think that they can’t be solved.

尽管我承认这个问题很难，但是我并不认为无法解决。

While I admit his good points, I can see his shortcomings.

虽然我承认他的优点，我也能看出他的缺点。

While I was angry with her, I didn’t lose my temper.

虽然我很生气，但我当时没有对她发脾气。

While I understand your viewpoint, I don’t agree with you. 虽然我了解你的见解， 我还是不能同意(你)。

I earn only 120 dollars a week, while she earns 180 dollars. 我一星期只赚120美元，她却赚180美元。