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1）明确学习目标读写结合，用“任务型”教学法高效完成学习任务。
2) 有效获取阅读信息，想象与推断结合。教学
重难点重点：
1) 掌握本单元所学情态动词表推测的用法，并能正确运用此句型来进行表达。
2) 能根据上节所学短文，综合运用就本单元所学习的语言知识来写作推测事件发展可能性。
难点：
有条理地写出事件发生过程和事件发展可能性。 教学过程Ⅰ. Revision
1. show three pictures in PPT,and make inferences.“who, job, doing”Use “must, might, could…”
2. Review the grammar.
（设计意图：通过语法的复习，为下一步教学做好准备。）
〖信息技术应用点〗
1.学生课前应用网络查询、归纳整理情态动词的用法。
2.教学课件。
II. Task1:Finish the Self Check
1. Fill in the blanks with“must, might,or can’t”
(way:on their own)
2.Read the chart and make sentences, Tell them make sure that their nem sentences are different from the ones in the activity.
(way:they can do it with their partners)
III. Task2:Writing
1.pre-writing (work on 3a)
1)Read through the article in 3a on page 59 again and finish the chart.
2)Talk with your classmates about your inferences and reason.
3)choose the most imaginative explanation in each group and tell all the students.
（设计意图：阅读回顾丰富语言输入；小组合作省时高效，有利于学生合理的展开想象推测事件发展的可能性。）
〖信息技术应用点〗 希沃白板
2.while-writing (work on 3b)
1）Students look at this newspaper headline and tell Ss what they should do.
2）Writing tips:
First part: (background information about the mystery)
Last week, in a quiet neighborhood ,something strange happened…