【AEAS考试网】in case 详解(下)
目前,AEAS考试报名受到的关注越来越高,AEAS培训录取竞争越来越激烈。这里应广大学子的要求,AEAS考试网为大提供AEAS真题模拟成绩提升技巧,这次介绍的是in case 详解(下)。
二、复习要点
1. 掌握三种用法
in case的用法,归纳起来,主要有以下三种:
(1) 用作连词,表示条件,其意为“如果”“万一”。如:
In case you see him, ask him about it. 如果你见着他,问问他这事。
Tell me in case you get into difficulty. 遇到困难请告诉我。
If case I forget, please remind me about it. 万一我忘记,请请醒我一下。
(2) 用作连词,表示目的,其意为“以防”“免得”。如:
I’ll take my raincoat in case it rains. 我将带上雨衣,以防下雨。
I shall sit up for a time, in case I’m wanted. 我暂时不睡以防需要我。
I bought the car at once in case he changed his mind. 我马上买下了那辆汽车,以免他变卦。
I don’t let him climb trees in case he tears his trousers. 我不让他爬树,以免撕破裤子。
(3) 起副词作用,其意为“以防万一”。如:
You’d better carry some money in case. 你最好带些钱,以防万一。
The sun is shining, but I’ll take an umbrella just in case. 现在是晴天,但我还是带上雨伞以防万一。
The dog was chained, but I carried a stick in case. 狗是用链条锁住的,但我带着一根棍子以防万一。
2. 注意in case 后从句的时态
(1) 原则上说,若主句为现在时态,则从句也用现在时态;主句为过去时态,从句也用过去时态。如:
I always keep candles in the house in case there is a power cut. 我家里常备有蜡烛,以防断电。
I wrote down her address in case I forgot it. 我记下了她的住址,免得忘了。
He wasn’t going to use his car in case somebody recognized it. 他不打算用自己的汽车,因为怕有人认出他的车。
(2) 有时从句也可用“should+动词原形”这样的虚拟语气(不管主句为现在时态还是过去时态)。如:
I don’t let him go out in this weather in case he should catch cold. 我不让他这种天气出去以防他会感冒。
I’ve bought a chicken in case your friend should stay to lunch. 我买了一只鸡,免得你的朋友万一留下来吃午饭没菜。
(3) 注意,当主句为将来时态时,从句谓语不能用将来时态,而要用一般现在时表示将来意义。如:
I’ll keep a seat for you in case you change your mind. 我给你留一个座位,以防你会改变主意。
3. 不要混淆in case 与in case of
in case 可用作连词和副词,而in case of 用作介词。如:
In case of fire, ring the bell. 如发生火灾,请按铃。
The wall was built along the river in case of floods. 沿江筑了堤坝以防有洪水。
有时两者可以互相转换。如:
In case I’m not here, ask my brother to help you.=In case of my not being here, ask my brother to help you.
如果我不在,可让我弟弟帮助你。
4. 弄清in case与if的区别
注意下面两个句子在意思上的不同:
I’ll come tomorrow in case Ann wants me. 明天我要来,以备安找我。
I’ll come tomorrow if Ann wants me. 如果安找我,我明天就来。
但是,介词短语 in case of…与 if there is…的意思却相同。如:
In case of accident phone 999.=If there is an accident phone 999. 如果发生事故,请拨电话999。
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