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Micro Course 授课教师:彭细英 学校:东莞市洪梅中学 状语从句系列之一 If 引导的条件状语从句 此相框
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教学目标:了解条件状语从句的含义及用法。 教学重点: if 引导的条件句的三种结构(主祈 从现 / 主将从现 / 主情从现)。 教学难点: if 引导的条件状语从句与宾语从句 的差别。
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If you are happy
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What will you do if you are happy? If 引导条件状语从句 clap your hands stomp your feet shout “hurray” 1.If you are happy, you will______________. 2.If you are happy, you will______________. 3.If you are happy, you will______________. 结果主句 if “ 如果, 假如 ” 它引导的句子表示某事发生所需的条件, 即 “ 在 … 条件下,某事才能发生 ” ,在句子中充当状语,因 此称之为条件状语从句。
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主句时态 从句的时态 If 引导的从句是一个完整的句子, 一定要有主语 注意 用法 If 引导的条件状语从句
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/ in the library /quiet / keep read books If you want to read books in the library, keep quiet. 从句用一般现在时 主句为祈使句 用法 1 :如果 主 句是 祈 使句, 从 句要用一般 现 在时。 Join the sentences with if: 用 if 连接句子 Join the sentences with if: 用 if 连接句子 主祈从现
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your hands/put up /answer the question Put up your hands if you want to answer the question. Look and say 主句 从句 主祈从现
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If it is sunny this weekend, what will you do ? If it is sunny this weekend, I will play football with my classmates. 从句为一般现在时 主句为一般将来时 用法 2 :如果 主 句为一般 将 来时, 从 句用一般 现 在时. 主将从现
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If it is sunny this weekend, what won’t you do ? I won’t stay at home if it is sunny this weekend. 主句 从句 主将从现
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Heshouldeat something if he feels hungry. He should eat something if he feels hungry., shehave a rest If she feels tired, she must have a rest. 用法 3 :如果 主 句含有 must, may, can 等 情 态动词, 从 句也要用一般 现 在时。 What should he do if he feels hungry? If she feels tired, what must she do?
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小结 1 1.主祈从现 2. 主将从现 if… will/won’t 3. 主情 (can/may/should/must ) 从现 小结 2 例如 :1. If the red light is on, wait a minute. 2. Wait a minute if the red light is on. 1.If 从句, + 主句. 2. 主句 + 从句. If 引导的条件状语从句
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1.If she ______ (be) kind to me, I ___________ (not argue) with her. 2.If you_____ (buy) a new camera,_____ (get) a good one. 3.If he ________(be) ill, he should see a doctor. 4.If the rain _______ (stop) tonight, we _____ (go) to the cinema. 5.You may _____ (pass) the exam if you ___ (study) hard. 6.If I ________ ( not, eat )so much,I ____ (get) thinner. iswon’t argue buyget is stops will go pass study don’t eat will get Exercises: 用括号内所给词的正确形式填空
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1. 如果 if 条件状语从句谈论的是重复发生或预示要发生的情景 和事件(即客观真理),则主从句大多用一般现在时态。例如: If bears are in danger,they attack (袭击) people. 2. 在 if 引导的状语从句中,主句不用 be going to 结构,而用 will 。 3. 在 if 引导的状语从句中不能用 some ,而用 any. If you have any question to ask, please come to my office. If it doesn’t rain tomorrow, he will go bike riding. 知识拓展
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1.I don’t know if it will rain tomorrow. 2.I want to know if she is at home. 3.He asked me if everybody was here. if 意为 “ 是否 ” ,引导宾语从句, 通常放在主句谓语动词(及物动 词)或介词之后,宾语从句的时态要根据实际情况而定。 --Let’s go fishing if it _______this weekend.(2011 广东) --But nobody knows if it_______ A. is fine, will rain B. will be fine, rains C. will be fine, will rain D. is fine, rains A A 难点突破
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1. If you heat ice,it _________(turn) to water. 2.If you have ____(any/some) question, you can ask me for help. 3.Can you tell me if he _________ (come) tomorrow? If he ________(come) tomorrow, I ________(give) him a book. Fill in the blanks : will come comes will give turns any
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句式结构 : 时态 If 从句 , + 主句. / 主句 + 从句. 一般现在时一般将来时 (will) 情态动词 (can/must/should/…) 祈使句 If 还有 “ 是否 ” 之意,引导宾语从句,从句的时态要根据实际情况而 定。
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if 条件句不一般, 几个要点记心间 ; 条件句, 放在前, 逗号要放句中间。 条件句表可能,主将从现不一般; 条件句表事实,主句常用现在时。 if 还有 “ 是否 ” 意,宾语从句放后边。 If 从句口诀 Nothing is impossible if you put your heart into it! 世上无难事,只怕有心人
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