《派生(构词法及应用)ppt课件.ppt》由会员分享，可在线阅读，更多相关《派生(构词法及应用)ppt课件.ppt（26页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、派生派生(derivation)前缀前缀(prefix) & 后缀后缀(suffix) 复习构词法之一复习构词法之一派生，了解派生，了解前缀和后缀的作用前缀和后缀的作用 学习常见的前缀和后缀学习常见的前缀和后缀 应用：语法填空应用：语法填空 阅读理解中猜词义阅读理解中猜词义学习目标学习目标able_反反adv.vt.反反adj._Lead-inableunableablyenabledisable反反adv.vt.反反adj.disabled派生法：由词缀（分前、后缀）和词根派生法：由词缀（分前、后缀）和词根相结合构成新单词的方法。相结合构成新单词的方法。 加前缀：加前缀： happy unh
2、appy 加后缀：加后缀： develop development 既加前缀又加后缀：既加前缀又加后缀： forget unforgetable派生词派生词 前缀前缀表否定：表否定：dis-, in-, im-, ir-, il-, un-, non- dislike incorrect impolite irregular illegal unlike non-stop over-：超过，超出：超过，超出 overweight overwork oversleepmis-：错误：错误 misunderstand misdore-：再，又：再，又 rewrite reuse pre-：先于：先
3、于. preview prepayfore-：前：前, 预先预先 forehead forecast后缀后缀1. 名词后缀：名词后缀：表人：表人：-er, -or,-ist worker actor artistadj.n.: -ness sadness darknessv.n.: -t/-te -tion actaction inventinventionv.n.: -ment development movement2. 形容词后缀：形容词后缀：-ful：充满：充满.的的 careful harmful -less: 缺少缺少.的的 careless harmless -ive：有：有.倾
4、向的倾向的 effective attractive -able：可以：可以/能够能够.的的 buyable enjoyable-ed：(人人)感到感到.的的 annoyed 表被动表被动 written words 表完成表完成 boiled water-ing：令人：令人.的的 annoying 表主动表主动 the dancing girl 表进行中表进行中 boiling water3. 副词后缀：副词后缀：-ly: quickly equallyPS：并非全部：并非全部-ly结尾的词都是副词：结尾的词都是副词： lovely 可爱的可爱的 friendly 友善的友善的 likely
5、 可能的可能的 lonely 孤独的孤独的4. 动词后缀动词后缀-en：使：使. deepdeepen widewiden有时有时en-：enable enlarge enrich思考：前缀和后缀分别改变的原词思考：前缀和后缀分别改变的原词的什么？的什么？ possible impossible invent invention 前缀前缀 后缀后缀 词性词性 意思意思Task 1 value v. _ 有价值的有价值的 entertain v._ n. likely adj.反义：反义：_ read v._ 误读误读 appear v. _ 消失消失 joy n._ adj. broad ad
6、j._ vt.拓宽，拓展拓宽，拓展 help n. _ adj.无助的无助的valuable-mentun-dis-mis-fulen-lessadj.娱乐娱乐adj.不可能的不可能的v.v.快乐的，高兴的快乐的，高兴的Task 2分析画线词的词性和词义。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 不不预先预先看见看见可以可以的的adj. 不可预见的不可预见的方法方法: 拆分单词拆分单词常见常见的猜词义的猜词义题目题
7、目:1. The 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
8、 be easy for someone 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(判断判断) about B. understand somebody wrongly C. give a wrong description(描写描写) of D. form a wrong opinion about Task 3mis- 错误错误 represent
9、 vt.陈陈/描述描述2. Dont listen to his nonsense. 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，无非，无sense n.意义意义pre-: 在在.之前之前liberation
10、n.解放解放4. Shops are very overcrowded now. A. busy with much work 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 goodun- 表否定表否定belie
11、ve v.相信相信-able adj.能能.的的over- 过度过度crowd v. 拥挤拥挤-ed adj. Task 4 运用所学知识，完成语法填空练习。运用所学知识，完成语法填空练习。 解题方法：解题方法： 1、阅读全句，正确理解句义及所缺、阅读全句，正确理解句义及所缺词词词义词义。 2、分析缺词担任的、分析缺词担任的句子成分句子成分，正确，正确判断判断词性词性。(如动词、名词等如动词、名词等) 3、判断缺词应采用的正确、判断缺词应采用的正确词形词形。(如如动词的形式、名词的单复数等动词的形式、名词的单复数等) Without proper planning, tourism can c
12、ause 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 _(annoy) and unhappy. They begin to _(like) tourists and to treat them _(politely). They forget how _(help) tourism c
13、an be to the countrys economy. -ed-ableimpolitely-istsdis-ful It is important to think about how tourism affects the people of a destination (目的地目的地) country. The _(develop) of tourism is quite beneficial, since it can help a country keep the customs and beauty that are _ (attract) to tourists. It w
14、ill 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 other parts of the countrys economy can suffer. -ment-ivehappiness-ly Exercise on the paper. Exerc
15、ise on P28, Workbook.HomeworkYouth is a kind of wealth. It will gradually _(appear) with time elapsing(流逝流逝). What can we do is not to waste the youth. In my opinion, for one thing, it is to realize our value, our idea. When we are young, we have the best conditions in our lives, good memories, good
16、 _ (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.1dis-ingsen-ful Teenagers secrets should be kept to themselves, and no one else, including the
17、ir 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 puzzled by the _ (expect) changes in their body and mind. Whats more, exposed to a w
18、orld 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. 2unexcepted-ment-lynaturalSome even begin to date with a girlfriend or a boyfriend without their parents knowledge. They are doing all th
19、is 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 and 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