in case用于什么时态

桂香分享 2017-08-12 17:36:07

　　in case有假使;以防;也许等意思，那么你知道in case用于什么时态吗?下面是学习啦小编为你整理的in case的时态的相关资料，希望大家喜欢!

　　in case的时态

　　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。

　　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。

　　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。

　　in case

　　if 如果;若

　　*In case he arrives be fore I get back，please ask him to wait.如果我回来前他就到了，请叫他等我。

　　*In case it rains，do not expect me. 如果天下雨，就不要指望我来了。

　　*in case of in the event of; as for要是;在… 时(候)In case of fire，the alarm bell.如遇火灾，即按警铃。

　　*In case of any difficulty，call me at once.如有任何困难，立即找我。

　　*In case of illness， you must consult a doctor.假使有病，你必须请医生诊治。

　　1. We have an auxiliary generator in case of power cuts.

　　我们有一台万一断电时使用的备用发电机。

　　2. In case you need something, please don't hesitate to let me know.

　　如果你需要什么东西，请不客气地对我说。

　　3. It may rain you'd better take an umbrella (just) in case (it does).

　　可能下雨--你最好带把伞, 以防万一(下起来).

　　4. In case that he leaves, please inform me.

　　如果他离开, 请通知我。

　　5. In case of rain, they can't go.

　　万一下雨，他们就不能去了。

　　6. In case (=If) I forget, please remind me.

　　万一我忘记，请提醒我。

　　7. Write the telephone number down in case you forget.

　　把电话号码写下来以免忘了。

　　8. The doctor asked us to call him during the night except in case of necessity.

　　医生吩咐我们，除非必须，否则不要在夜里叫他。