Unit2WitnessingtimeTask2Thoughtsonthedesign:继续以伦敦塔为主题，通过学习音节重读和单词重读，进一步提高学生准确得体运用英语的能力；学会通过使用特定的句型和词汇以非正式的语气表述正式的话题。Teachingaims:Afterlearningthesecondhalfofthetask,studentswillbeabletohaveageneralideaonwordstressandsentencestress.Theyareremindedofpayingmoreattentiontothecorrectpronunciationanddoabetterjobincommunication.Inaddition,studentscanbeabletowriteinformallyaboutaformaltopicbyusingcertainsentencestructuresandspecialvocabularywhilewritingtotheirfamilyorgoodfriends.Teachingprocedures:Step1Stressingsyllablesandwords.1.Alittlequizatthebeginningoftheclass.AskSstotrytopronounce‘increase’intwodifferentsentences.2.Askthemtochoosethecorrectmeaningforthesamesentence‘Pleasesitdown’,withfirst‘down’stressed,indicatingspeaker’sanger.[Explanation]以提问的形式激发学生对单词中音节的重读和句子中单词重读的语音现象的兴趣，同时引出下一个教学环节：进一步学习教材上有关音节重读和单词重读的介绍。3.AskSstoreadtheintroductiononwordstressandsentencestress,givingthemabriefsummaryandsomemoreexamplestoconsolidate.4.AskSstoread4moresentencescorrectly,payingspecialattentiontothestressedwords.[Explanation]首先，要求学生明确重读的基本概念，在此基础上配以设当的练习予以巩固和提高，以此来达到讲练结合、优化课堂效率的目的。Step2Askingaboutthecrownjewels1.Presenting2picturesofcrownjewels,askingstudentstoaskasmanyquestionsaspossibleoncrownjewels,supposingtheyfirstseethejewelswhilevisitingthetower.Whileanswering,onestudentshouldraiseatleastonequestionthatisdifferentfromthatofothers.[Explanation]围绕王室御宝这一话题鼓励学生自由提问，为下一步的情景对话进行热身训练。同时要求学生尽可能多的提问，而且不能重复，以此来训练学生的发散思维，同时也用来训练他们的听力。2.AskSstoreadtheinstructiononstep2askingaboutthecrownjewelsandthenpractisethedialoguewiththepartner,payingspecialattentiontothewordandsentencestress.3.Invitesomepairstoperformthedialogue.[Explanation]本环节要求学生能够根据提示，分别以游客和导游的身份对王室御宝进行问答，旨在养成学生发散思维的能力，并特别注意渗透对重要信息需要重读的概念，以此来强化训练本课的重读技能训练，同时也为下一步的写作做好语言准备。Step3Writinginformallyaboutaformaltopic1.AskSstodiscussthefollowingtwoquestions:(1)Whatisyourchoice:ane-mailoratraditionalletter?Why?(2)Howdowewriteontheenvelopeandwhatisincludedonalettersheet?[Explanation]以简单地探讨电子邮件和平信的优缺点来引出一般信件的书写格式，学生对英文信件的格式不甚了解，故先用讨论的形式作为铺垫。2.Showstudentsexamplesofhowtowriteontheenvelopeandwhatisincludedonalettersheet.[Explanation]温故而知新，既复习平信的书写格式，又为最后的写作奠定格式的基础，降低写作的难度。3.AskSstoreadtheinstructiononhowtowriteinformallyaboutaformaltopicandthenanswerthequestion.4.AskSstorewritethesentence‘ThefactisthattheTowerofLondonhasserveddifferentfunctionsinhistory,suchastheking’spalace,prison,andevenasafe.’informally.[Explanation]首先要求学生熟悉能以非正式的写作风格表达正式的话题的一些特定的句型和词汇，同时配以典型的训练例句予以揣摩和巩固。5.Mini-discussion:AskSstodiscusswhichinformationonthetowerofLondonisworthtelling.6.AskSstocombinetheinformationintoaparagraphusingthestyleofinformalwriting.[Explanation]通过讨论，引导学生复习伦敦塔的有关信息，同时结合已学的非正式语气的写作方法进行段落的写作，通过实践进一步巩固所学的写作知识。Step4HomeworkAskSstowritealettertotheirparentsonthetower,usingtheinformalstyleofwriting.Revisethewritingwiththepartner.[Explanation]通过围绕主题的不同形式的操练和非正式语气写作方法的训练，最终要求学生以写信的形式作为回家作业，在充分的语言输入和语言训练之后实现有效的语言输出，力求达到学以致用、不断升华的教学效果。
