8Aunit4(Grammar)教案

Unit 4 Wild animals (Grammar 预习案)课型：预习课主备人：李慧学习目标： 1.学会正确运用if 引导的条件状语从句。

2■学会正确使用because和because of表示原因。

语法剖析(1) If it is fine this afternoon,I will go shopping with you. 如果今天下午天气好的话，我会和你去购物。

(2) We can go on a trip tomorrowif it doesn't rain. 如果明天不下雨的话，我们可以去旅游。

(3) Come to my office if you have time. 如果你有时间，来一下我的办公室。

⑷If bears are in dan ger,they attack people如果熊处于危险中，它们是会攻击人的。

结论：通过观察例句(1)(2)和(3)我们可以看出，if 后接的是一个句子，这样的句子我们称之为条件状语从句。

If 意为“ ____________ ”,表示如果从句的动作发生，主句的动作就会发生。

If引导的条件状语从句通常用___________ 寸态，但表示的是将来要发生的事，主句多用_______时态，有时也可以用情态动词或用祈使句，但表示的也是将要发生的事。

If引导的条件状语从句可放在主句之前，也可以位于主句之后。

但是从句在前时，主从句之间必须用____________ 隔开。

体会：通过观察(4)我们发现，主句没有用一般将来时，而是用了一般现在时。

这是条件状语从句的一个特殊性：如果句子表示“客观事实” ，主句和从句通常都用一般现在时。

随堂导练请将下列各题中所给的句子用if 连成一个句子。

1.Sandy does not have time. I will ask Lucy instead.语法剖析(1) Tina didn'tcome to school because she fell ill.(2) -- Why do you all like to make friends with Mark?---- Because he has a good sense of humour.(3) We had to stay at home because of the bad weather.(4) Simon hurt his knees because of falling over a stone.(5) Mary is sad because she failed the exam.= Mary is sad because of failing the exam.结论：通过观察上面几个例句可知，because和because of都可以表示引起某个结果的原因，但是用法有区别。

通过观察(1)(2)可知，because用作____________ ，后面必须接一个句子，because和这个句子一起构成原因状语从句，从句通常位于主句之后。

because引导的句子可以直接回答以______ 开头的特殊疑问句。

通过观察例句⑶⑷可知，because of是复合介词，其后只能跟名词(短语) 、________ 或代词，后面不能跟从句。

体会通过观察例句⑸可知，含有because和because of的句子有时可以互相转化。

随堂导练。

一、请根据句意，用because和because of填空。

1. Many people in wenchuan lost their homes ____ the earthquake.2. We must protect wild animals _____ they are our friends.3.She looked much older than her age _____ 10-year hard work.4. Peter won'tjoin our party __ he is very busy.5.1 bought this shirt ____ I liked its colour.二、请根据上句完成下句，使上下两句意思相同或相近，每空词数不限。

1. Daniel arrived at the airport late because the traffic was heavy.Daniel arrived at the airport late because of _________________ .2. The young man lost one of his legs because he drove carelessly.Because of __________________ , The young man lost one of his legs.3. All the people enjoyed themselves because the show was very wonderful.All the people enjoyed themselves _______________ the wonderful the show .4.1 felt very tired because I read books for too long last night.I felt very tired because of ___________ for too long last night.5. The students are all busy because they will have the final exams next week.The students are all busy _________ the final exams next week.Unit 4 Wild animals (Grammar 教案) 课型：新授课主备人：李慧教学目标：1、正确识别并运用if 条件状语从句讨论可能出现的情况。

2、正确识别并运用“ because和“ because of ”表示原因。

教学内容：句型：if hunters catch a giant panda,they will kill it for its fur. Giant pandas will surive if we protect them.I will get enough information for my report.教学准备：教学步骤Step I呈现1、教师通过“填入动词的正确形式”来引出if 从句：If hunters catch a giant panda,they ______ it for its fur.(kill)If farmers cut down trees and forests,giant pandas ___ nowhere to live(. have)If people find baby pandas alone,they___ often ___ them away.(take)If giant pandas are in danger,what___ we ___ ? (do)教师一边向学生陈述上述内容，一边将其呈现在黑板上，并将画线部分用红笔标出，讲解if 从句表假设的用法。

Step n练习1、教师指导学生两人一组讨论完成课本第64页A1部分，请学生朗读答案，教师可予一定的评析。

2、教师说：We are always very interested in wild animals.Where can we see many wild animals? 肯定会有学生回答：At the zoo. 然后教师继续：Amy is going to zoo.Let 's look atthe notes and find out why she wants to the zoo. 学生讨论，完成课本65页A2部分练习。

学生朗读答案。

核对。

3、教师说：When Amy returns home from Beijing Zoo,her father wants to know how much information about wild animals she got.he is asking her questions. 完成课本66页A3部分对话练习。

两人一组互相检查，核对答案。

邀请两位同学分扮Mr zhao 和Amy巩固记忆。

Step 川1、教师说：I have a friend,May.She loves lovely animals.Can you guss which isher favourite wild animals? 学生猜测并给出理由。

询问若干个学生后，教师说：She likes dolphins best because they are lovely and clever. 并将此句写在黑板上，用红笔标出because,教师讲解用法。

2、教师可以举出更多的例子：Many wild animals died because they did n't have enough food.We must protect wild animals because they are our friends.The number of giant pandas is getting smaller because hunters hunt them fortheir fur.Step W练习1、独立完成课本67页B部分练习。

集体核对答案。

Step V呈现1、教师说：Sometimes manywild animals maydie because the weather is terrible.For example,if it has snowed heavily for,maybe they can't find enough food and then they will die.将“ Some wild animals may die because of the heavy snow ” .写在黑板上，用红笔标出because of , 讲解其用法。

2、让学生完成67页C部分练习，检查核对答案。

Step切家庭作业1、用if, because与because of各造两个句子。

Unit 4 Wild animals (Grammar 巩固案)课型：练习课主备人：李慧学习目标： 1.学会正确运用if 引导的条件状语从句。