译林版九年级英语下册Unit 4 Life on Mars第4课时示范课教案
展开Unit 4 Life on Mars
Grammar
一、教学目标
1. 掌握重点词汇和短语：circle, agreement, possibility, stranger, aware, distance, alien, outer space,
as tasty as, remind sb. that/of sth., be sure that/about sth., thin air, indoor playgrounds
2. 掌握重点句型：
Are they sure about the fast speed of space travel?
It takes Mars about two Earth years to circle around the Sun once.
3. 总结如何将状语从句、宾语从句和定语从句转换为简单句。
二、教学重点及重点
重点：
总结如何将状语从句、宾语从句和定语从句转换为简单句。
难点：
总结如何将状语从句、宾语从句和定语从句转换为简单句。
三、教学过程
Task 1
Step 1 Warming-up
Guide Ss to watch a video and think a question.
Why do we explore Mars?
【设计意图】通过观看视频并思考问题，引导学生进一步了解火星。
Step 2 Presentation
1. Present some sentences and guide Ss to observe the sentences.
【设计意图】通过让学生观察几组句子，引导学生发现并感知复合句和简单句之前是如何转换的。
2. Guide Ss to change some adverbial clauses into simple sentences with prepositional phrases beginning with at the age of, because of and without.
【设计意图】通过用含有at the age of, because of和without的介词短语，将一些状语从句改写为简单句，启发学生如何将含有从句的复合句改写成简单句。
Step 3 Practice
Guide Ss to rewrite the sentences using the words in brackets.
【设计意图】通过操练巩固已学知识，反馈矫正。
Task 2
Step 1 Presentation
1. Present some sentences and guide Ss to observe the sentences.
【设计意图】通过观察几组句子，引导学生发现并感知复合句和简单句之间的转换。
2. Guide Ss to change some object clauses into simple sentences with prepositions like of and about.
【设计意图】引导学生用一些介词，如of和about等将一些宾语从句改写成简单句，启发学生如何将含有从句的复合句改写成简单句。
Step 2 Practice
Guide Ss to rewrite Millie’s sentences using the words in brackets.
【设计意图】在语境中练习，内化语言，为综合输出做准备。
Task 3
Step 1 Presentation
1. Present some sentences and guide Ss to observe the sentences.
【设计意图】 通过让学生观察几组句子，启发学生了解如何将复合句改写成简单句。
2. Guide Ss to change some defining relative clauses into simple sentences with prepositions like with and in.
【设计意图】引导学生用一些介词，如with和in等将一些定语从句改写成简单句，启发学生如何将含有从句的复合句改写成简单句。
Step 2 Practice
1. Guide Ss to rewrite the defining relative clauses in simple sentences with in or with.
2. Guide Ss to replace each of the underlined parts with another expression.
【设计意图】通过在语境中操练巩固已学知识，反馈矫正。
Step 3 Summary
Summarize what they’ve learnt in this class.
Step 4 Homework
1. Review the grammar learned in the class.
2. Preview Integrated skills.
【设计意图】帮助学生内化语言和信息，积累语言，并预习下节课内容。
四、板书设计
Unit 4 Life on Mars
Grammar
1. Using adverbial clauses or simple sentences
2. Using object clauses or simple sentences
3. Using defining relative clauses or simple sentences
