英语七年级下册Unit8 语法专项ppt课件(There be句型)(新人教版).ppt

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1、Unit8语法专项课件（There be句型）,初中英语人教版七年级下册,there be句型定义,there be 构成的句子称为“存在句”。此句型构成形式一般为 “there be + 某人/物 + 地点/时间”，意为：在某地有某物（或某人）。,There is a cat under the tree.树底下有一只猫。,There are two students in the classroom. 教室里有两个学生。,there be句型定义,there be句型结构,肯定句：there be + 其他,否定句：there be + not + 其他,疑问句：be + there +

2、其他,There is a bag on the desk.,There isnt a bag on the desk.,Is there a bag on the desk?,there be句型结构,“Whats + 表示地点的介词短语”用there be句型来回答。,Whats on the desk?There are 5 eggs on the desk.,注意：询问的时候，be动词只能用单数is， 而回答时需视情况而选用单复数。,易错点1,a. There is +单数可数名词不可数名词,There is a book on the desk . 桌子上有一本书。,There is

3、 some water in the bottle.瓶子里有些水。,用法,易错点1,b. There are +复数名词,There are some pictures on the wall.墙上有些图画。,There are two apples in the basket.篮子里有两个苹果。,用法,易错点2,There be句型的就近原则,There be 就近原则：若句子中有几个并列主语时，be动词的形式要与离其最近的一个主语在人称和数上保持一致。,1.There is a girl and two boys under the tree.,2.There are two boys a

4、nd a girl under the tree.,易错点3,have/has与主语是 “所属关系”，强调的是 “拥有，占有” 。there be表示“存在关系”，强调某地“有”某物， （某地存在）,There be与have的区别,易错点3,I have many friends. 我有很多朋友。There is a book on the desk. 桌子上有一本书。,(拥有）,（某地存在）,【典例1】What_ on the shelf? There are some books. A. be B. am C. are D. is,考查be动词。句意：架子上有什么？有几本书。 What

5、be + 表示地点的介词短语提问，be动词只能用is。,【典例2】Is there a garden in the yard? Yes, there is. And there _ beautiful flowers in it. A. is so much B. are so many C. is so many D. are so much,考查there be句型。句意：院子里有一个花园吗？有，并且里边有很多漂亮的花。flowers为可数名词单数，选用are和many来限定，故答案选B。,【典例3】There _ an eraser, two pencils and a knife in the box. A. are B. is C. have D. has,考查there be句型。句意：盒子里有一个橡皮，两支铅笔，一个小刀。“某地有某物”选用there be句型；根据“就近原则”，an eraser为单数，选择is。,