Differentpartsofasentence概念句子是由词按照一定的语法结构组成的.组成句子的各个部分叫做句子的成分.句子的成分包括：主语、谓语、表语、宾语（直接和间接宾语）、宾语补足语、定语和状语.主语和谓语是句子的主体部分（在英语中,一般句子必须有主语和谓语）,表语、宾语和宾语的补足语是谓语里的组成部分.其他成份如定语和状语是句子的次要成分.▲句子成分分类1．主语主语是谓语讲述的对象,表示所说的“是什么”或“是谁”.一般由名词、代词、不定代词或相当于名词的单词或短语来充当,也有从句充当的现象.大多数主语都在句首.如：讲述“谁”Weworkinabigfactory.讲述“什么”Theclassroomisverybig.数词作主语Threeareenough.三个人就够了不定式作主语TooperateontheblindisoneoftheORBISDoctor’sjob.从句作主语Whatweneedisfood.我们最需要的是食物.▲在“Therebe…”句型中,主语的位置在中间.如：Therearesomebottlesofmilkinthebox.▲在个别句型中,主语在整个句子后面,这时前面用it作形式主语.如：Itisveryinterestingtoplaythegamecalled“treatortrick”.Ittooktwoworkersaboutthreemonthstobuildthehouse.2．谓语谓语时用来说明主语“做什么”、“是什么”或“怎么样”,谓语必须是动词,谓语和主语在“人称”和“数”两方面必须一致.如：Heisverygenerous.ShelooksverysmartandcoolWehavefinishedthejob.HecanspeakGerman.3．表语表语说明主语“是什么”或“怎么样”,由名词、形容词、介词、副词、不定式及相当于名词的词或短语来充当,它的位置在系动词后面.形容词作表语Youlookyoungerthanbefore.名词作表语Myfatherisateacher.副词作表语Everyoneishere.介词短语作表语Theyareatthetheatre.不定式作表语MyjobistoteachthemEnglish.动名词作表语Herjobistrainingthenurses.从句作表语Thatiswhyhedidn’tcometoschoolyesterday.4．宾语▲宾语是动作、行为的对象,由名词、代词、不定式、或相当于名词的词或短语或从句来充当,它和谓语动词一起说明主语是什么,通常放在谓语动词后面.有时,会有双宾语.如：名词作宾语Heneverforgivesothersfortheirmistakes.代词做宾语Heoftenhelpsme.不定式作宾语Helikestosleepintheopenair.动名词作宾语TheAmericansenjoyedlivinginChina.从句做宾语Ibelievethattheycanfinishtheworkintime.▲直接宾语和间接宾语及物动词作谓语时,后面要跟宾语,宾语分直接宾语和间接宾语.直接宾语是及物动词的对象.但有些动词除了直接宾语外,还需要有一个间接宾语,间接宾语表语动作是对谁做的,所以只能用名词或代词来充当.如：Webroughtthemsomefood.主谓间宾直宾间接宾语可以放在直接宾语后面,但必须加to或for.5．宾语的补足语在英语的句子中有些句子里只有宾语并不能表达完整的意思,还必须在宾语后面加上宾语的补足语才能表达完整的意思.我们把“宾语＋宾语补足语”合起来称为复合宾语.复合宾语所表达的意思相当于一个巨资的意思.名词、动词、形容词、副词、介词短语、不定式、现在分词、过去分词都可以作宾语补足语.如:名词作宾补Ifyouletmego,I’llmakeyouking.形容词作宾补Don’tmakeyourhandsdirty.副词作宾补WefoundLiMingoutwhenwearrived.介词短语作宾补Makeyourselfathome.省略to的不定式作宾补Isawagirlgointothebuilding.带to的不定式作宾补Theboyorderedthedogtoliedown.现在分词作宾补Thebosskeptthemworkingallday.过去分词作宾补Yesterdayhegothislegbroken.在英语中,常见的“宾语＋宾语补足语”的结构有：▲“宾语+名词”.常用于改结构的动词有：call,name,make,find,choose,think,leave等.WecallhimJack.TheymadeLiLeitheirmonitor.▲“宾语+形容词”.常见的动词有think,believe,leave,drive,make,keep,turn,wish,want等.如：Doyouthinkhisideawrong?Wemustkeepourclassroomclean.Wecan’tleavehimalone.CanyougeteverythingreadyforthepartybeforeFriday?▲“宾语+副词”.副词作宾补常表示宾语的状态,与宾语有逻辑上的主表关系.常见的副词有：down,up,here,there,home,in,out,anywhere等.如：Lethimin/out.Mr.Lidroveushome.Whengotthere,wefoundhimout.▲“宾语+介词短语”.介词短语作宾补常表示其逻辑主语（即宾语）所处的状态,两者有主表的关系.如：Wefoundeverythingingoodorder.Weregardhimasourgoodfriend.Heopenedthedoorandfoundsomeofhisfriendsintherain.▲“宾语+不定式”.充当宾补的不定式有三种：A要求带to的不定式Thecoolwaterofthelakeinvitedustoswim.B要求不带to的不定式let,make,see,hear,watch等Thebossmadetheworkerswork12hoursaday.IoftenhearhimreadEnglishinhisroom.C单词help后可加to或不加toShesometimeshelpshermother(to)dohousework.▲“宾语+现在分词”.现在分词作宾补,此时在该句型中的宾语即为现在分词逻辑上的主语,有着主谓关系.Isawthemplayingontheplayground.IheardMarysingingintheclassroom.▲“宾语+过去分词”.宾语和宾补之间是被动关系,过去分词表示被动和完成.Ihadmybikestolen.Theteacherexplainedagainandagaintomakehimselfunderstood.▲形式宾语＋形容词WefounditimpossibletogettherebeforeSat