Unit 6 When was it invented？第四课时　Section B (1a～1e).doc

第四课时Section B (1a1e)【学习目标】1能够通过听说学习与食物有关的词汇。2让学生通过阅读理解如何用一般过去时的被动语态描述发明史。【学习重点】重点单词及短语：sour，by mistake【学习难点】学会用一般过去时的被动语态对更广泛的发明进行描述。学习提示Teacher helps students to reviewthe words about food by asking：How doestaste？Encourage students to recall more adjectives to describe these fruits and food.Task 1学习提示Preview the words on P45，read the words by phonetic symbols and mark the new words in the text.Finally finish the task of 1a.Task 2学习提示Listen to the tape on P45 and finish the listening tasks in 1c.Then students listen to the tape again and finish the listening task in 1d.Listen to the tape for third time，finish the complementary tasks.(A)1.When were potato chips invented?AIn 1853.BIn 1850.CIn 1835.(B)2.Who invented the potato chips?AA customer.BA cook.CA boss.(C)3.Why was the plate of fried chips sent back?ABecause they were crispy.BBecause they were cut thin.CBecause they were cut too thick.情景导入生成问题T：Do you know how the apples can taste?S1：Yes.They may taste sweet.T：And the oranges?S2：sweet bananas；crispy potato_chips；salty noodles；sour grapes.自学互研生成能力Task 1Lets read new words and the phrases.1I can read.(我会读)预习下列单词，争取自己能正确拼读。拼读成功后再在课文中把单词标记出来。crispy，salty，sour，by mistake，customer2I can write.(我会写)翻译下列短语：(1)more than one 不止一个(2)thin enough 足够薄(3)in the end 最后Task 2Lets listen to the tape and finish 1c，1d.Task 3Lets make conversations and interview.1I can translate.(我会译)(1)你知道土豆片是在无意中发明的吗？Did you know potato chips were_invented_by_mistake?(2)顾客认为土豆不够薄。来源:学。科。网Z。X。X。KThe customer thought the potatoes were not thin_enough.来源:Z,xx,k.Com(3)最后他在它们上面撒了许多盐以使它们足够咸。Finally he put lots of salt on them so they were salty enough.2I can make conversations.(我会编对话)你能结合课文内容编写对话，讨论薯片的发明过程吗？A：Did_you_know_potato_chips_were_invented_by_mistake?B：Wow，I_didnt_know_that.Who_invented_them?A：They_were_invented_by_a_chef_called_George_Crum.B：When_were_they_invented?A：They_were_invented_in_1853.B：How_were_they_invented?A：George_Crum_cooked_them_for_a_long_time_until_they_were_crispy.And_he_put_lots_of_salt_on_them_so_they_were_really_salty.(A)4.What did people think of the thinlysliced，salty chips?AThey liked them very much.BThey no longer ate them.CThey hated them.(C)5.What is the passage talking about?AA car accident.BThe way of cooking potato chips.CThe invention of potato chips.【学法指导】mistakemistake作名词，意为“错误”。by mistake是介词短语，意为“错误地”；make a mistake意为“犯错误”。mistake作动词，意为“弄错，误解”。mistakefor意为“把误当作”。enoughenough作形容词时，enoughn.n.enough；enough作副词时，adj./adv.enoughto do意为“够而能做”。Task 3学习提示【备注】结合1c和1d完成教材1e的任务，要求学生模仿听力内容，进行对话练习，谈论物品的发明者，发明时间等。According to 1C and 1d complete textbook 1e task，require students to imitate the listening，carry on the conversation practice，talk about the invented of the objects invented time and so 3.I can summarize.(我会总结)归纳until的用法：(1)until用于肯定句中，意为“(一直到)为止”，主句中的谓语动词必须是延续性动词，表示这一动作或状态延续到until状语所表示的时间为止。(2)until用于否定句中，即notuntil，意为“直到才”。它表示主句的动作直到until状语所表示的时间才发生。若主句为将来时，从句常用一般现在时。交流展示生成新知xkb1Show in groups.(Time：six minutes)First the students read the words and phrases in groups，then read together and sum up the usage of the words in groups，mark the difficult words in pronunciation and understanding(they can ask the teacher for help)At last write them on the blackboardFirst the students discuss and check the answers in Task 3 in groups，then discuss and set scenes to perform dialogues.At last write show contents on the blackboard.Class show.(Time：sixteen minutes)1I can read.Read together，pay attention to the pronunciation of “crispy” and “customer”；Consolidate the word learning by word game.2I can write.Students translate the phrases into English by answering quickly；Read together；Spot test：Consolidate the usage of phrases by making sentences.1I can translate.Ask students to translate the key sentences in Task 3；Read together.2I can make conversations.Students make dialogues according to the task；Set scenes to perform the dialogues；Spot test：Interview in class and design exercises about dialogue completion according to the interview.3I can summarize.Sum up the usage of “until”；Spot test：Consolidate the usage of“until”by making exercises themselves，then check the answers by answering quickl