外研版（2019）必修第一册 Exploring English Using language构词法课件（共34张PPT）.pptxVIP

Period2UsinglanguageUnit2ExploringEnglish

英语中的构词法主要有缩略法（abbreviating）转化法（changingthepartofspeech）派生法（addingaprefixorsuffix）合成法（combiningtwoormorewords）Wordformation构词法:是单词构成的基本规律，按照一定的语言规律创造新词的方法叫做构词法。Review:wordformation

abbreviating（缩略）Awordformedfromthefirstlettersofthewordsthatmakeupthenameofsth.（缩略法，即将单词缩写，词义和词性保持不变）WorldHealthOrganization→WHOInformationTechnology→ITtelephone→phoneaeroplane→plane2.截头缩略1.首字母缩略examination→examlaboratory→lab3.去尾缩略

VeryImportantPersonChiefExecutiveOfficerChinaCentralTelevisionWorldTradeOrganizationVirtualRealityVIPCEOCCTVWTOVR

changethepartofspeech（词性）(改变单词的词性)Conversion（转化）(1)动词名词Lookatme.Letmehavealook.(2)名词动词Openyourbook.Imustbooktheticket.(3)形容词动词Ourclassroomisveryclean.Wecleanourclassroomeveryday.(4)形容词名词(意义改变)Youareright.Citizenshavetherighttospeakfreely.

请大家判断词性转化类型,然后翻译句子(1)Letmehaveatry.(2)Youcould?shoulder?thetask.(3)Youshouldtryyourbesttobetteryourperformance.(4)Theyare?discussing?the?content?ofthe?story.v.-n.让我来试一试。n.-v.你可以承担这项任务。adj.-v.你应该尽最大努力让自己有更好的表现。adj.-n.他们正在讨论这个故事的内容。【即学即练】

Derivation派生byaddingaprefixor(and)asuffix(在词根上加上前、后缀构成另外一个词)unemployment单词=前缀词根后缀改变词义词的本意改变词性

Prefix-前缀1.表示否定的前缀：dis-il-im-ir-in-un-2.表示空间位置，方向的前缀:by-inter-mid-under-3.表示比较程度差别关系的前缀：extra-over-super-under…4.表示时间的前缀：ex-foremid-post-5.表示重复的前缀：re-6.表示动化的前缀：en-

1.表示否定意义前缀：Prefix-前缀dis-in-il-im-ir-mis-non-un-convenient→inconvenientlegal→illegalpossible→impossibleresponsible→irresponsibleability→disabilityunderstand→misunderstandprofit→non-profitcertain→uncertain

Prefix-前缀by-“附近，邻近”road→byroadunder-“在......下面”ground→undergroundinter-“在……间，相互”national→internationalmid-“中间”night→midnight,autumn→mid-autumnre-“又,再”arrange→rearrange）en-“使......”able→enablepre-“前”war→pre-warpost-“后”war→post-war2.表示空间位置