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1、派生(derivation),前缀(prefix)&后缀(suffix),复习构词法之一派生，了解前缀和后缀的作用学习常见的前缀和后缀应用：语法填空 阅读理解中猜词义,学习目标,able,_,_,_,_,反,adv.,vt.,反,adj.,_,Lead-in,able,unable,ably,enable,disable,反,adv.,vt.,反,adj.,disabled,派生法：由词缀（分前、后缀）和词根相结合构成新单词的方法。,加前缀：happy unhappy 加后缀：develop development既加前缀又加后缀：forget unforgetable,派生词,前缀,表否定：
2、dis-,in-,im-,ir-,il-,un-,non-dislike incorrect impolite irregular illegal unlike non-stop over-：超过，超出 overweight overwork oversleep,mis-：错误 misunderstand misdore-：再，又 rewrite reuse pre-：先于.preview prepayfore-：前,预先 forehead forecast,后缀,1.名词后缀：表人：-er,-or,-ist worker actor artistadj.n.:-ness sadness da
3、rknessv.n.:-t/-te-tion actaction inventinventionv.n.:-ment development movement,2.形容词后缀：-ful：充满.的 careful harmful-less:缺少.的 careless harmless-ive：有.倾向的 effective attractive-able：可以/能够.的 buyable enjoyable,-ed：(人)感到.的 annoyed 表被动 written words 表完成 boiled water-ing：令人.的 annoying 表主动 the dancing girl 表进
4、行中 boiling water,3.副词后缀：-ly:quickly equallyPS：并非全部-ly结尾的词都是副词：lovely 可爱的 friendly 友善的 likely 可能的 lonely 孤独的4.动词后缀-en：使.deepdeepen widewiden有时en-：enable enlarge enrich,思考：前缀和后缀分别改变的原词的什么？possible impossible invent invention 前缀 后缀 词性 意思,Task 1,value v._ 有价值的entertain v._ n.likely adj.反义：_ read v._ 误读a
5、ppear v._ 消失joy n._ adj.broad adj._ vt.拓宽，拓展help n._ adj.无助的,valuable,-ment,un-,dis-,mis-,-ful,en-,-less,adj.,娱乐,adj.不可能的,v.,v.,快乐的，高兴的,Task 2,分析画线词的词性和词义。This possibility was unforeseeable，because it almos tnever happened.,unforeseeable un fore see able,不,预先,看见,可以的,adj.不可预见的,方法:拆分单词,常见的猜词义题目:1.The
6、underlined word XXX means/refers to/stands for _.2.The word XXX can be replaced by“_”.3.Whats the meaning of XXX?4.Which of the following is the closest in meaning to XXX?,1.Remember that People on line may not be who they seem.Because you cant see or even hear the person.It would be easy for someon
7、e to misrepresent himself or herself.Thus someone who says that she is a 12-year-old girl.could really be an old man.A.make a wrong judgement(判断)about B.understand somebody wrongly C.give a wrong description(描写)of D.form a wrong opinion about,Task 3,mis-错误 represent vt.陈/描述,2.Dont listen to his nons
8、ense.A.meaningless words B.beautiful words C.meaningful words D.unpleasant words3.He lived a hard life in pre-liberation days.A.before liberation B.after liberation C.since liberation D.during liberation,non-:非，无sense n.意义,pre-:在.之前liberation n.解放,4.Shops are very overcrowded now.A.busy with much wo
9、rk B.having too many people C.full of energy D.too complicated to understand5.He was performing and his technique was unbelievable.A.can be trusted B.very exciting C.very attractive D.difficult to believe;very good,un-表否定believe v.相信-able adj.能.的,over-过度crowd v.拥挤-ed adj.,Task 4,运用所学知识，完成语法填空练习。解题方法
10、：1、阅读全句，正确理解句义及所缺词词义。2、分析缺词担任的句子成分，正确判断词性。(如动词、名词等)3、判断缺词应采用的正确词形。(如动词的形式、名词的单复数等),Without proper planning,tourism can cause problems.For example,too many _(tour)can crowd public places,which are not so _(enjoy)for people living there.If tourism creates too much traffic,people there will become _(an
11、noy)and unhappy.They begin to _(like)tourists and to treat them _(politely).They forget how _(help)tourism can be to the countrys economy.,-ed,-able,impolitely,-ists,dis-,-ful,It is important to think about how tourism affects the people of a destination(目的地)country.The _(develop)of tourism is quite
12、 beneficial,since it can help a country keep the customs and beauty that are _(attract)to tourists.It will also advance the wealth and _(happy)of local people.Too much tourism can be a problem.If tourism grows too _(quick),people must leave other jobs to work in the tourism industry.This means that
13、other parts of the countrys economy can suffer.,-ment,-ive,happiness,-ly,Exercise on the paper.Exercise on P28,Workbook.,Homework,Thanks!,Youth is a kind of wealth.It will gradually _(appear)with time elapsing(流逝).What can we do is not to waste the youth.In my opinion,for one thing,it is to realize
14、our value,our idea.When we are young,we have the best conditions in our lives,good memories,good _(understand)and so on.We should make full use of these conditions to study more.For aother,we should _(rich)our lives,make them _(color)and and gather as many different experiences as possible.,1,dis-,-
15、ings,en-,-ful,Teenagers secrets should be kept to themselves,and no one else,including their parents,has the right to stick their noses into the childrens private life.As we know,teenagers are going through a special period of _(develop)both physically and _(psychological).They are curious about and
16、 puzzled by the _(expect)changes in their body and mind.Whats more,exposed to a world of adults,it is only too _(nature)for them to begin imitating adults behavior in secret.Boys begin to smoke and girls begin to spend time doing their hair.,2,unexcepted,-ment,-ly,natural,Some even begin to date wit
17、h a girlfriend or a boyfriend without their parents knowledge.They are doing all this in secret because they are still _(sure)whether it is right to do so and afraid that,if found out by their parents,they will get _(misunderstand).And in fact,in many cases,parents cannot deal with the matter well a
18、nd hurt their childrens feelings _(bad),so the children are not _(will)to communicate with them.When this happens,it hurts terribly the whole familys feelings.So it seems right that teenagers should keep their secrets to themselves and their parents should allow their children that right.,un-,misunderstood,-ly,-ing,
