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1、句式结构及时态句式结构及时态： If an earthquake happens, many buildings will fall down.If a fire happens, dont be nervous.If a car accident happens to you, what should you do?从句从句: 从句：一般现在时从句：一般现在时从句：一般现在时从句：一般现在时主句：主句：主句：祈使句主句：祈使句主句：含情态动词主句：含情态动词can/could/must/should等等 一般现在时一般现在时一般将来时一般将来时(will)Revision句式结构句式结构：
2、时态时态: 祈使句祈使句一般将来时一般将来时(will)一般现在时一般现在时,情态动词情态动词(can/must/should/)SummaryIf从句从句，+ 主句主句. / 主句主句 + 从句从句 例句：如果明天不下雨，我们将去露营。例句：如果明天不下雨，我们将去露营。 If it doesnt rain tomorrow, well go camping. 如果你想取得好成绩，你必须更努力学习。如果你想取得好成绩，你必须更努力学习。 If you want to get good grades, you must study harder. 如果发生火灾，请打如果发生火灾，请打110。
3、If a fire happens, please call 110.考点注意考点注意：if的两个不同用法的两个不同用法: “是否是否”；“如如果果” Can you tell me if he _ (come) tomorrow? If he _(come) tomorrow, give the message to him.will comecomes7. If you (find/found) the gas leaks out, (open/opening) the windows as soon as possible.8. If there (will be/was/is) a f
4、ire, the house (will be/was/is) be in ruins(化为废墟化为废墟).二、用括号内所给词的正确形式填空：二、用括号内所给词的正确形式填空：1.If he doesnt go to the party, I _, either.2.If she _ (be) kind to me , I _ (not argue) with her.3.I want to know if he _(come) tomorrow, if he _(come), I will give the message to him. 4. Where _ he _(see) the film if he _(have) time?5. If there _(be) fewer trees, there _( be) more pollution.6. If an earthquake _ (happen) in Shantou, can you imagine what _ (happen)?7. If you _ (have) a car accident, you should call your parents or your friends.8. If you _(stay) at home alone, what _ you _ (do)?
