1、Unit2 Topic3 SectionA 精品学案教学目标：1.掌握四会词汇和句型。. 2.学习由连词or, and, but和while连接的复合句。 3.复习与环保有关的词汇与表达自我的观点。 4. 从“减量”、“再使用”和“再循环”的角度谈论保护环境。 教学重点:1. 学习由连词or, and, but和while连接的复合句。 2. 复习与环保有关的词汇与表达自我的观点来源:学&科&网教学难点：学习由连词or, and, but和while连接的复合句。课前预习1.大声朗读本课生词和短语，并熟记。2.中英互译。spread the message _ 保护环境_ 省钱_鼓励某人做某事
2、_ so that _ give up _努力工作_ fail the exam _ 点头_shake the head _ 快点_ a Clean-up Day_based on _3. 预读1a的对话，利用课文注释疏通对话大意，并完成1b的表格。4.再读1a,完成1c.5. 思考：对话中提到的保护环境的三个重要途径是：_、_和_。预习指导一、阅读2中的每个小题的两个句子，根据句意判断其中的逻辑关系，并按要求用连词合并成一个句子。思考：由and, but, or和while等并列连词连接的两个或多个简单句称为并列句。表示句子之间的并列、选择、转折关系等。其中and表示_关系；but表示_关系
3、；or表示_关系；while表示_关系。二、重点探究：1. 观察2的每组句子。完成2.2. 语法精讲：概念：并列句是由并列连词把两个或两个以上的简单句连在一起构成的句子，连词前可用逗号，也可不用逗号。1) 表示并列关系，常用连词and等。如：His father is a teacher and his mother is a doctor. 译：_His father is a teacher and writer. 译：_2) 表示转折关系，常用连词but, while等。如：I bought my sister a present, but she didnt like it. 译：_T
4、om does housework every day while his sister does nothing. 译：_3) 表示选择关系，常用连词or, either.or.等。如：Do it yourself or ask somebody else to do it. 译：_Either he could not come or he did not want to. 译：_4) 表示因果关系，常用连词so, for等。如：Her mother is ill, so she has to stay at home and look after her. 译：_The ground i
5、s very wet, for it rained last night.译：_三、学习1a并在文中找到应掌握的知识点 1). a few+可数名词的复数“一些、几个.” ； a little+ 不可数名词。2). environmental protection环境保护。3). work for doing/n.为.工作，为坚持不懈地努力。 e.g. 我们应该为节约用水而努力。 We should _._water. 4). My main job is to do sth.我的工作是 不定式作表语。5) reduce sth. to. 使.处于.状态。6). encourage sb. t
6、o do sth. 鼓励某人做某事。 E.g. Helen often encourages me to study hard.7). Its nice of you to do that. 你那样做真善良！ It is/was+ adj.of/for sb.to do sth. 句型中的it 是形式主语，真正的主语是to do sth。当用形容词来描述人的性格、特征、品质时，通常选用of。这类形容词有good, kind, nice, wise, clever, right 等。 而当形容词用来描述事物的性质特征时，通常用for。这类形容词有easy ,difficult, hard, im
7、portant, necessary等。 e.g. 你能来实在太好了。 Its_ _you to come. e.g. 对每一个人来说节约用水都很重要。Its very _ _everyone to save water. 8). suppose (v.) 意为“认为猜想” e.g. 他想这只猫已经死了。He _the cat_ _ be supposed to do sth.应当做某事。=should do/ ought to d o.e.g. 老师应该知道很多。Teachers _know a lot. be supposed to do sth.用于否定句时意为“允许” e.g. 这里不
8、允许打篮球。You _ _ _play basketball here. 巩固落实Group work:Suppose you will have a Clean-up Day. Work in groups and find out the garbage. Then sort them based on 3a and talk about them.检测训练1. 考点探究 ( ) 1. Use your head_ youll have an idea. A. or B. and C. but ( ) 2. Study hard _ youll fail in the exam. A. o
9、r B. and C. while ( ) 3. I dont like basketball _football. I dont like basketball _I like football A. or but B. and and C. and but ( ) 4. John fell asleep _he was listening to the music. A. or B. and C. while ( ) 5 Be quick! _youll be late for school. A. But B. Or C. And ( ) 6. Work hard, _ you will
10、 fail the exam.A. and B. but C. or D. while( ) 7. Our task is _ the lost child.A. finding B. found C. to find D. find2. 根据句意以及中文提示完成句子。（一空一词）1.那段时间的确很艰难，但是我们从未放弃过希望。It was a difficult time ,but we never _ _ hope.2.The little boy saved every coin _ _ (为了) he could buy his mother a present on Mothers Day.3.学生的任务就是努力学习。Students job is _ _ _.4.李梅很擅长语文，而她的妹妹数学很好。Li Mei is good at Chinese _ her sister does well in math.5.快点吧，否则我们就要迟到了。Please be quick, _ well be late.
