初中英语构词法之前缀和后缀讲解课件.pptx

1、the prefix and suffix,前缀和后缀,导学：,教学目标：1.记忆并运用已学过的前缀和后缀2.能使用构词法推断生词的基本含义教学重点：掌握前缀和后缀的构词法,教学难点：能根据构词法来推测生词的含义,根据已学的知识补充这五句话：Anne Frank was so lucky(luck)that she was discovered by the Nazis.I think Anne wished to live a peaceful(peace)life.Spud Webb disliked(like)sitting in the stands,watching others p

2、laying in the court.Spud Webb had manyachievements(achieve)in the NBA.It was unbelievable(believe)that Spud Webb beat out many other players in the Slam Dunk Contest.He was so small.,像刚才五个句子里的Un-和 dis-都是前缀，-ful 和-ment 都是后缀。luck,peace,like,achieve和 believe 都是词根。,英语单词构成有其规律，很好的掌握了构词规 律，才可以很好、很快的、准确的记忆

3、单词。英语单词构词法的核心部分，在于词根。词根 可以单独构成词。后缀是一种重要的构词法，通过后缀常常可以判断出一个词的词性。一个英语单词可以分 为三个部分：前缀（prefix），词根（stem）及后缀（suffix）。单词中位于词根前面的部 分就是前缀。前缀，可以改变单词的意思。后 缀，又称词尾，是一种后置于其他词素后的词 缀，改变单词的词性。,help(形容词)move（名词）wise（名词）,quick（副词）,helpful,wisdom,honest（反义词）dishonestclean（名词）,revent（名词）prevention,movement friendly（反义词）un

4、friendly,quickly,value（形容词）valuablehappy（名词）happiness danger（形容词）dangerousdirect（反义词）indirect possible（反义词）impossiblehome（形容词）homeless,cleaning,在阅读中，除了根据上下文猜测生词词义外，我们 还可以根据一些构词法常 识来猜测生词词义，在平 时学习中要留意一些构词法知识。你们能不能说出 一些前缀和后缀呢？-ness,-tion,-ment,-ing,-dom 等通常是 一些名词的后缀。-less 是否定后缀，ir-，dis-,un-,in-,im-是否定前

5、缀。-able,ous,tive，ful 等是形容词的后缀，-ly 多为副词的后缀。,猜一猜下列划线单词的意思并说出它们的构词,方法。,wartime.In this book,Anne a Jewish girl,describes her boredom with being away from the outside world,her unhappiness with living in a small place all year,and her fear of discovery and death.,畅销书,The diary of a Young Girl became a b

6、est-seller as soon as it was published.Soon it was 虚re构a的d，想 by pe战o争pl时e worldwide.It is not an imaginary象的,story b 期ut a true experience of a teenager in,犹太的,无聊,1,2,3,4,5,6,写出下列单词的名词形式：shop shoppingcarelesscarelessnessinvent invention,Love is the most,(power),thing in the world.,powerful,Dont be s

7、o impatient(patient)to the old.Talk with them as much as you can.,根据要求写单词。,rotect（名词）true(副词),ossible（反义词）impossible,protection,truly,The sports meeting was successfully(success)held last week.,We are amazed at the fast our hometown.A.developmentB.developing C.developed D.developer,of,A,HomeworkFinish the rest exercises in.Pre-learn Task,