prep+og13语法总结

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1、1.句子残缺i.缺动词：2.固定搭配ØfailtodosthØthemethodistodosthØIncontrastwith/toØHelp:helpsb(to)dosth,Help(to)do,behelpfulin(要注意)Øestimate用法üestimate(that)（不需加原V）üestimate+N+tobeN(adj)(prep2-51)üestimate+N+at+价格等数量词（估价）（除此概念以外优先用estimatedtobe表达）如：40to44millionyears是时间概念，要用estimatedtobe40to44millionyearsold.Øcon

2、traryto：一般接抽象名词(ideas,opinions,oractions)，在句首的时候不需要逻辑主语Øthesame…asüGalileowasconvincedthatnaturalphenomena,asmanifestationsofthelawsofphysics,wouldappearthesametosomeoneonthedeckofashipmovingsmoothlyanduniformlythroughthe waterastoa personstandingonland.Øseem的用法：üseemtodosthItseemsthat+从句Itseemsasi

3、f+从句Ødebilitation和debilitating区别：debilitation虚弱，乏力，debilitating使虚弱的Øadvocate及物动词argueforØtherivalsxandy/therivalrybetweenXandYØbeexpendedon/insthØenshrine通常用被动，enshrinein或者beenshrinedin被动语态Øaswellas有主次之分，A是主，B是次Ørequire的用法：ürequiredsometime/sbtodosth,Requiresb.doing…错误überequiredtodosth,ürequiretha

4、tsb(should)dosthürequireofsbthat..(should)do..需要某人做某事ürequiredoing（require主动表被动含义）ArequiremakingknowntoB..Ørather/instead单独用时为副词，所以加句子，不能加不定式Ørecommend的用法：1.推荐，推举，举荐；a)recommendsb.sth.=recommendsth.tosb.给某人推荐b)recommendsb.forthejob/post/position给某人推荐岗位（工作）c)recommendsb.as+职务推荐某人做什么2.建议，劝告，忠告；【同advi

5、se用法一样】recommendsb.todosth.建议某人做某事recommenddoingsth.建议做某事recommend...that+主语+shoud(在GMAT中必须省略)+动词原形+其他【虚拟语气】ps:区别advise与suggest的用法没有suggestsb.todosth.其余的一样。Øtodosth.takessbsometime;ittakessbsometimetodosth;当sth.作主语时注意sthtakessbsometimetodo后面不加宾语Ørestrictionon而不是forØaggravating使恼怒和aggravate加重ØsuchAa

6、sB结构=AsuchasB谓语单复数情况和A一致，因为B只是举例的内容Øactlike和actas区别：actlike用于修饰人，behaveinasimilarmanner,actas=fonctionasØannouncesthtodosthannouncesomethingtosomebody或者announcetosomebodysomething(相当于宾语后置)announceadecision/intention/plan(在这个时候如果plan等后面接todo不会产生todo做状语修饰announce的歧义)*:Thegovernmenthasannouncedplansto

7、create10,000newjobs.announce(that)如果宾语从句引导词that不补出，依然能使正常读者清晰断句，且announce后面常常不补出。announcesomebody/yourself通报...的到达;通知...已准备好（注意这个短语有专门意思）错误用法：announcetodo/besth.Øevidence后面要跟同位语从句来说明evidence的具体内容，而evidencef