句子基本结构句子种类两种分类法按句子结构可分三种：1）简单句：只有一个主语（或并列主语）和一个谓语（或并列谓语）。e.g.HeoftenreadsEnglishinthemorning.TomandMikeareAmericanboys.Shelikesdrawingandoftendrawspicturesforthewallnewspapers.我们能够给句子动词加上副词修饰，给名词加上形容词、介词短语修饰，给句子加上状语进行修饰等，以使整个句子意思变得愈加丰富和充实。但不论怎样变，都只有一个主谓结构。Heworkedhardallhislife.HeisaschoolstudentinNo.1MiddleSchool.2)并列句：句型：简单句+并列连词+简单句并列句是由两个或两个以上简单句连接而成。并列句中各简单句意义同等主要，相互之间没有隶属关系，是平行并列关系。它们之间用连词连结。e.g.Youhelphimandhehelpsyou.Thefutureisbright;theroadistortuous.并列句分类3、表示转折，惯用连词有but,yet,while等。e.g.Hewasalittlemanwiththickglasses,buthehadastrangewayofmakinghisclasseslivelyandinteresting.4、表示因果关系，惯用连词有so,for等。e.g.Augustisthetimeoftheyearforriceharvest,soeverydayIworkfromdawnuntildark.3）复合句：含有一个或一个以上从句句子。从句包含名词性从句（主语从句、宾语从句、表语从句和同位语从句）定语从句和状语从句等。句型主句+连词+从句；或连词+从句+主句e.g.TheforeignvisitorstookalotofpictureswhentheywereattheGreatWall.复合句就是含有两个或两个以上主谓结构句子。这种结构中，必定有一个主谓结构是句子主句部分，而另一个主谓结构则是句子次要部分，即从句部分。Wherethereisawill,thereisaway.Exercises判断句型3.WeoftenstudyChinesehistoryonFridayafternoon.4.TheboywhoofferedmehisseatiscalledTom.5.Thereisachairinthisroom,isn’tthere?6.HeisinClassOneandIaminClassTwo.7.Hewasfondofdrawingwhenhewasyetachild.8.MybrotherandIgotoschoolathalfpastseveninthemorningandcomebackhomeatsevenintheevening.9.Neitherhashechangedhismind,norwillhedoso.10.Whathesaidatthemeetingisveryimportant,isn’tit?11.BothTomandJackenjoycountrymusic.句子成份和句子结构简单句五个基本句型主语＋不及物动词Shecame.主语＋及物动词＋宾语ShelikesEnglish.主语＋系动词＋主语补语Sheishappy．主语＋动词＋间接宾语＋直接宾语ShegaveJohnabook．Sheboughtabookforme.主语＋动词＋宾语＋宾语补语Shemakeshermotherangry．Theteacheraskedmetoreadthepassage.（There+beThereisabookonthedesk.1.主语（subject）：句子中心词，说明人或事物。Thesunrisesintheeast（名词）Helikesdancing.（代词）Twentyyearsisashorttimeinhistory.(数词)Seeingisbelieving.（动名词）Toseeistobelieve.（不定式）Whatheneedsisabook.（主语从句）Itisveryclearthattheelephantisroundandtalllikeatree.（It形式主语，主语从句是真正主语）(一）指出以下句中主语中心词①Theteacherwithtwoofhisstudentsiswalkingintotheclassroom.②Thereisanold