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1) 掌握下列词汇：laboratory, outdoors,coat, sleepy.
2）灵活运用情态动词表示推测的用法
Ability goals:To improve Ss’ ability of using grammar to solve problems.
Emotion goals: 通过本课的学习，养成根据事实推测的好习惯和培养观察，归纳总结解决问题的能力。
Teaching methods: 启发式教学和讨论法
Teaching Important Points：情态动词must, could, may,might. can’t表推测，对不同时候发生的事情进行推测。
Teaching Difficult Points：情态动词must, could, may,might. can’t表推测在肯定句，否定句和疑问句中的正确运用,培养学生的判断能力和逻辑思维能力。
Teaching Aids：multimedia courseware,micro class.
Teaching Steps：
Step 1 Leading in
1.Greeting.
2.Review the strange noises in the passage we leaned in the last class and share with the class.
T: Who can tell me what the strange noises are?
S1: It could be an animal.
S2: It must be / might be / can’t be …
3.导入新课，教师板书：modal verbs inference
设计意图:这一环节的设置主要是继续巩固前面所学的情态动词表推测的用法，同时为下面继续学习这一用法奠定基础。
Step2 Play a game: use modal verbs to guess whose school things they are.
whose … is this ？It must/could/may/might/can’t be …
设计意图：用实例练习语法，教师引导学生练习情态动词为后面的语法总结做准备。
Step3 Grammar Focus
1.Let students complete the sentences according to Chinese.
2.Check the answers.
3.According to the sentences we talked about school things and grammar focus ,think over the usage of modal verbs for making inferences.
设计意图： 引导学生探讨情态动词表推测的用法并进行归纳总结，便于学生更好地掌握目标语言.
Step4 Watch a micro class.In order to know more about the usage of modal verbs and try to remember them.
1.Ask students to summarize the usage of the model verbs.
2.Ask students to read the sentences on the screen .
设计意图：学生自己总结情态动词的用法，有助于他们建立知识间的链接，更好地掌握并运用情态动词的用法突破难点。
Step5 Finish the task in 4a then report the answers in pairs.