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
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。
If you are happy
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。
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
/ 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
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
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
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
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?
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
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
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
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
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
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。
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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