Module2 Man's best friends Unit 4 Save the trees 课件2

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1、Unit4Module2Man’sbestfriendsSavethetreesGrammarAUsingsuffixestoguessmeanings.BThepresentcontinuoustense.CMaking–ingformsDLinkingwordsEMillionvs.millionsofAUsingsuffixestoguessmeanings-able,-al,-dom,-en,-ence,-er...-fulLookatthesetwosentences.Doyouknowthemeaningsof“useful”and“harmful”?T

2、reesgiveusalotofusefulthings.Treestakeinharmfulgasesfromtheair.“Useful”and“harmful”bothendin-ful.Itisasuffixmeaning“fullof”.Canyouguessthemeaningsofthefollowingwords?hopefulhelpfulCanyougivesomemoreexamples?BThepresentcontinuoustenseWeusethepresentcontinuoustensetoshowthatsomethingisha

3、ppeningnow.Itisoftenusedwith:now,atthemoment,atthistime,thesedays…Thisisthestructureofasentenceinthepresentcontinuoustense.现在进行时的构成肯定句：主语+be(is/am/are)+现在分词否定句：主语+be(is/am/are)+not+现在分词一般疑问句：be(is/am/are)+not+主语+现在分词特殊疑问句：特殊疑问词+be(is/am/are)+主语+现在分词Makeconversations.S1:Whatis/are…doing

4、?S2:…cMaking–ingformsWashing~~~Washing~~~Weformthepresentcontinuoustensewiththeverbtobe+(thebaseform/the-ingform)ofthem+ingainverb.Weformthe–ingformofthemainverblikethis:Mostverbsverbsendingin-everbsendingin-iesomeverbsendinginavowelletter+aconsonantletter+ing除e+ing除ie+yingdoublethecon

5、sonantletter+ingSpecialrulesWecannotusesomeverbsinthepresentcontinuoustense.believehearlikeprefersmellunderstandhateknowloveseetastewantDLinkingwordsthen,next,after,...上述连接词或短语一般用于句首，后面通常有逗号。这些连接词或短语有助于理清思路，使介绍更有逻辑性。连接词/短语作用First(ly),Second(ly),Third(ly),etc.用于描述有先后次序的动作或步骤。Forexample,

6、…用于举例。However,…用于给出一个相反的意见或观点。Inaddition,…用于增加一项相近的内容。Finally,…用于表示接近尾声或文章结尾。Emillionvs.millionsofWeuse“million”inexactnumbers.Forexample,“ItcoversfiveandahalfmillionsquarekilometresoftheAmazonBasin”.Weuse“millionsof”toinferthattheamountisgreat.Forexample,“Butwecutdownmillionsoftreesev

7、eryday”.___________peoplehuntandfishforaliving.Thenovelsold2_________copiesinpaperback.__________peoplewerekilledintheearthquake.Weneedtoraiseabouttwo__________andfiftydollars.MillionsofmillionHundredsofhundredhundred,hundredsof,million,millionsofExerciseCompletethesentenceswiththewo