【#第一文档网# 导语】以下是®第一文档网的小编为您整理的《条件状语从句》，欢迎阅读！
条件状语从句 一、If引导的条件句 1、“if从句(一般现在时)+主句(一般现在时)”的条件句----表达真理或事实(动作必然发生)。 If you heat ice, it turns into water.如果你加热冰,它就会变成水。 If you put suger into water, it disappears.如果你把糖放进水里,它就会溶解。 2、“if从句(一般现在时)+主句(一般将来时)”的条件句----谈论可能发生的的事情。 If it rains tomorrow, we’ll stay at home.如果明天下雨,我们会呆在家里。 If I don’t hear from him, I won’t go. 如果没接到他的通知,我不会去。 *【注】这类条件句主句部分还可以用情态动词,如 I may buy a car if I pass the driving test.如果通过驾驶考试,我可能会买一辆车。 If you go to another country, you must obey the local laws.如果你去另一个国家,就必须遵守当地的法律。 3、有时if引导的条件句可以与“祈使句,and/or…”相互转换, If you don’t hurry up, you will miss the bus. =Hurry up, or you will miss the bus.快点,否则你会错过这趟车。 If you use your head, you’ll find a way. =Use your head, and you will find a way.动动脑子的话,你就会想出办法。 二、unless引导的条件状语从句 unless意为“除非、如果不”,用来引导否定意义的条件句,等于“if…not…” Let's go out for a walk unless you are too tired. = If you are not too tied, let's go out for a walk. 如果你不累，我们出去散步吧。 Unless you brush your teeth every day, you will get a toothache. =You will get a toothache if you don’t brush your teeth every day. 如果不每天刷牙,你就会牙疼。 完成句子 1. If I feel tired,_______________________( go / bed) 2. If I stay up late,_______________________(feel/ tired) 3. If I feel hungry,_______________________( eat/ something). 4. If I eat too much,_______________________( get/ fat). 5. If I feel ill,_______________________( see/ doctor). 用if 或unless填空 1. _______he wants to see me, you can tell him to wait. 2._______it snows tomorrow, we’ll have a day or two off. 3.We won’t go to his party_______he invites us. 4.She is sure to pass the exam_______she is ill. 5. _______I’m tired, I’ll have a rest for tea. 6.I won’t buy that backpack_______it costs less than 100 yuan. 本文来源：https://www.dywdw.cn/5fffaa58effdc8d376eeaeaad1f34693dbef1019.html
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2024-03-11
