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Word-formationGrammarWordformation1.转化法2.和成法3.缩略法4.缀合法5.变音法语言的基本要素之一是词汇，按照语言一定的规律创造新词的方法，称之为构词法（word-formation).缀合法：由词根附加前缀后缀构成新词的方法。由缀合法产生的新词称之为派生词(derivation)。缀合法产生的词汇是英语词汇的主体。例如：加前缀re+unitereunite(再联合)加后缀tract+ortractor(拖拉机)加前后缀un+friend+lyunfriendly(不友好)一、常见前缀1.表示否定意义的前缀dis-dishonest,dislike,disadvantageim-impolite,impossible.Listexamplesofwordformationasmanyaspossibleineachitem.mis-over-extra-inter-dis-ex--ion-through-ness-ment-urebio-Choosethewordsyoulikewiththeword-formationgrammarandmakeupastory,whichisbettertohavethetopicoffantasticstoryorsciencefiction.Oralcomposition:Discussion:Whatshouldyouconsiderwhenwritingthefantasticstoryorsciencefiction?Discussitingroupsandlisttipsasmanyaspossible.WritingpracticeTipsforyourwriting:1.Writedownallthewords;2.Makeachoiceofthewordsyouwilluse;3.Keepanotebooktocollectsentences;4.Beimaginativeinyourideas;5.Stateyourstoryclearlyandlogicallywithsomevividdescriptions.1.Askthestudentstowritethecompositioncarefullyaccordingtothetips.2.Finishalltheexercisesofthe“wordformation”and“grammarlearning”.3.FindmoreinformationaboutJulesVerneandhisworksandsharetogether.Thankyou!