约3370字。

　　必修2  Unit3 Computers   Language  points
　　【学习目标】
　　学生能够了解掌握重点单词的用法，并能基本理解文章大意。
　　【学习重点，难点】
　　The usage of the language points such as simplify, solve, from —on, explore, as a result, anyhow.
　　预习检测(学生活动)
　　1. Check the exercises in exercises book.
　　2.Ask some students to retell the passage in their own words
　　3.Asdents to learn the language points in exercise book by themselves
　　导入新课，展示目标（教师活动）
　　目标：1. Learn the words and expressions appearing in the reading passage.Over time, sum, go by, as a re sult, anyway, so…that.
　　2. Understand some difficult and long sentences.
　　Lead in
　　1. Get the students to read the re ading passage again to underline all the new words and useful expressions or collocations in the passage.
　　2.  Do the exercises in discovering useful words and expressions
　　互动探究，小组展示（生生互动）
　　language points
　　1. 自学
　　(1)words:  common, compare, anyway, goal
　　(2) phrases: as a result& as a result of
　　(3) sentence structure: by引导的时间状语 As& with “随着”
　　2. Check the answers with group members and discuss the difficult points.
　　师导生学，释疑解难（师生互动）
　　I. words
　　Although I was young, I can simplify difficult sums.
　　sum  n. 总数，总和；算术题；金额，钱数；
　　v. 共计，加起来
　　固定短语：in sum= in a word 总之
　　sum up 总结，概括
　　a large sum of 大量，许多（修饰不可数名词）
　　拓展：表示“总之”的短语有：
　　to sum up, in sum, in short, all in all, in a w ord, in brief
　　例句：
　　The sum of two  and f ive is seven.
　　It will cost an enormous sum to repair the swimming pool.
　　In sum, the plan failed. 总之，这个计划失败了
　　He gave me a large sum of food. 他给了我很多食物。
　　Now, sum up your views in a few words.
　　Ⅱ. 重点短语句型突破
　　1. As the years have gone by, …  随着
　　（1）go by 经过(某地)；(时间)过去；(机会等)失去；遵循，依据……办事    go by = pass
　　①A car went by at full speed.一辆汽车全速驶过。
　　②The weeks went slowly by. 一星期一星期慢慢地过去了。
　　③Don't let this chance go by. 不要错失这次机会。
　　④That is a good rule to go by.那是需要遵守的好规章。
　　（2）as conj.随着……，引导时间状语从句。
　　表示“随着……”时，也可以用with，而with 用作介词, 后接名词短语,形成with复合结构。