1、Unit6 When was it invented? Section B（1a-1e）导学案（第三课时）【学习目标】知识目标：1. 要记住的单词：crispy, salty, sour, chef, 2. 理解并运用短语：by mistake, thin enough, in the end3. 掌握并运用句型：(1)Potato chips were invented by mistake.(2)They werent salty enough. (3)The customer was happy in the end. 【学习重点】熟练运用一般过去式及其被动语态谈论事物的发明过程。【学习
2、过程】一、课前预习1. 预习第45页内容，写出下列单词和短语，然后小组内互查(1)salt (形容词) (2) potato(复数) (3) thin(比较级) (4)they(宾格) 2.汉译英(1)错误的 (2)足够的咸 (3)最后；终于 (4)薯条 (5)很长一段时间 二、课上活动（一）听力训练（1a1b）1. 听前。(1)看图片回答问题：（bitter 苦的hot 辣的）Can you tell me five tastes? _ Which food is sour? _ Which food is sweet? _Which food is bitter? _ Which food
3、 is salty ?_Which food is hot ? _ Which food is crispy ? _（2）处理1a、1b （3）了解1c、1d中听的任务。2. 听中。听录音，完成1c、1d中的练习。3. 听后。（1）听录音，回答自主学习指导课程中的问题。 （2）跟读，模仿对话。 （二）说的训练（1e）1. 结对活动。两人一组，练习1e的对话。2. 对话练习。两人一组，结合听力内容及1e做练习。3.理解文章中的大意及结构关系，尝试复述短文。三、语言知识1. salty: 咸的,含盐的. 是由名词（salt）加 y 构成的形容词类似的还有：cloud( ) wind( ), sun
4、( ), rain( ), sleep( )2. 翻译：薯条是由于失误被发明的。_“错误的，无意中”_。如：I took your pen by mistake. 我错拿了你的钢笔。知识拓展Make a mistake 意为“犯错误” ；make a mistake about 意为“误解” ；mistake for 意为“把错认成”3. 汉译英：最后顾客高兴了。_“最后；终于” _，相当于at last ，finally,其后不接of短语。强调“虽然最初 ，最后还是产生了一个的结果” 。如:We were out of danger in the end 四、难点点拨【短语辨析】 at th
5、e end of 与by the end ofat the end of 后接地点名词，表示：在的尽头；Eg:There is a school at the end of the road.后接表时间的名词，意为：在。结束时。Eg:We will have an English test at the end of this week.by the end of意为：在。以前，到为止。常用语将来和过去完成时态。Eg：We will finish the work by the end of the year.【知识拓展】辨析： finally, at last 与 in the end fi
6、nally 一般指一系列事物或论点的最后一项内容，或用在动词前，表示“等了好久才” ，没有感情色彩。 如：Finally, lets do some exercises. at last 往往表示经过一番努力或曲折之后，带有较浓的感情色彩。如：At last we arrived school.in the end 可与 finally 和 at last 通用。如：The war lasted four years before the North won in the end/finally/at last.这场战争持续了四年，最后北方取得了胜利。五、达标检测：用方框中所给的单词或词组的适
7、当形式填空in the end by mistake make call1. Our history teacher is funny .He often us laugh.2. Some things were invited , for example, potato chips. 3. Do you know the girl Marry?4.He thought about it for a long time. he worked it out.变为被动语态：1. We can finish the work in two days. The work _ in two days. 2. They produce silk in Suzhou. Silk _ in Suzhou. 3. The children will sing an English song. An English song _ by the children. 4. People use metal for making machines. Metal _ for making machines.
