1、2012 高考人教版选修 8-Unit 3 Inventors and inventions 教学案（短语、重点句型、易错题点拨）B 部分 *重点句型详解1But once_picked_up,_they tried to bite me.但是它们一被捡起来，就试图咬我。(1)once 作为连接词引导时间状语从句时，后面可接现在分词或过去分词。Once opened, the museum will be very popular with the citizens.博物馆一旦开放，肯定会受到市民的欢迎。(表被动)Once talking with him, youll find him an
2、 easygoing man. 一旦与他交谈，你就会发现他是一个随和的人。(表主动)(2)once 引导的从句中，要用一般时代替将来时。Once you have grasped English, youll be easy to get a wellpaid job.一旦你掌握了英语，你就会很容易找到一份报酬很高的工作。(现在完成时代替将来完成时)Once he arrives, we can start.他一到我们就可以开始。(一般现在时代替一般将来时)即境活用 1 (2007福建) You will be successful in the interview _ you have co
3、nfidence.Abefore BonceCuntil Dthough答案：B解析：考查状语从句。once “一旦”引导时间状语从句。before“在以前” ；until “直到” ；though“虽然” 。2Remember to include one change to your invention in_case it doesnt work the first time.记住对你的发明要有变化的余地，以防它第一次不起作用。in case(以防 )万一in case 后可接从句，也可置于句末。in case of 要是 ；在时候( 后接名词或代词)in this case 如果这样的
4、话in that case 如果那样的话in any case 无论如何in no case 决不(位于句首，句子应使用倒装语序)Take your umbrella in case it rains.拿着你的雨伞以防下雨。In case I forget, please remind me of my promise.如果我忘记了我的诺言，请提醒我。In case of fire, open this safety door.一旦发生火灾，打开这扇安全门。In no case may you leave the baby alone at home.你决不能把孩子一个人留在家里。即境活用 2
5、 (2007北京)Leave your key with a neighbor _ you lock yourself out one day.Aever since Beven ifCsoon after Din case答案：D解析：A 项意为“自从以来” ，B 项意为“即使” ，C 项意为“不久之后” ，D 项意为“以防；以免” 。句意为“留一把钥匙给邻居，以免有一天你把自己锁在门外” 。易 错 点 拨 自我完善误区备考case 构成的短语的用法应用 (1)It is reported that there will be a heavy rain tomorrow, _ the hik
6、e would be put off.Ain any case Bin which caseCin no case Din case答案：B解析：该题考查 case 的相关短语及定语从句，根据前面说“据说明天有大雨” ，可知 hike 在这种情况下要推迟，which 引导定语从句，指代整个主句。(2)The first bus has just left and the next bus will come in twenty minutes._， we will have to wait.AIn this case BIn this wayCBy this means DIn the end
7、答案：A(3)John may phone tonight. I dont want to go out _ he phones.Aas long as Bin order thatCin case Dso that答案：C解析：as long as 意为“只要” ，in order that 意为“为了” ，in case 意为“以防” ，so that 意为“以致；为了” 。in case引导条件状语从句。(4)I dont think Ill need any money, but Ill bring some _.Aat last Bin caseConce again Din time答案：B解析：根据句子中所说自己目前不需要钱，可是要带一点备用或者以防万一。in case 是“以防万一”的意思，恰好符合此意。in time 是“及时，恰好，迟早”的意思。(5)Youd better take something to read when you go to see the doctor _ you have to wait.Aeven if Bas ifCin case Din order that答案：C
