小学生英语语法be动词助动词及四种基本句式PPT课件

1、be动词 与 助动词四种基本句式判断句陈述句否定句疑问句第1页/共23页（一）be动词与助动词（1）be动词：表示“是”的意思。 am is are第2页/共23页第一人称：I amIm 第二人称：you are youre 第三人称：she/he is is not= isnt they aretheyre 第3页/共23页注意：第二人称you后面始终跟are，其单复数（“你”还是“你们”要根据后面的名词判断）You are a student.You are students.第4页/共23页（2）助动词。定义：协助主要动词构成谓语动词词组的词叫助动词 。助动词自身没有词义。do does

2、 would第5页/共23页do not= dontdoes not= doesntwould not=wouldnt第6页/共23页What would you like for lunch? I would like chicken for lunch.=Id like chicken for lunch.如：Do you like it? Does he like it? I do not like it. He does not like it. = I dont like it. =He doesnt like it.第7页/共23页问：老师说助动词是其它动词的小助手，自己没有词义，

3、那么 I do homework.里面“do”不是“做”的意思吗？第8页/共23页答：I do homework.里面的“do”的确是“做”的意思在这里，它不是助动词，而是“实义动词”，就是有实际意义的动词。第9页/共23页请判断下面动词是助动词还是实义动词。I have potatoes for lunch.I do homework on Sunday.He doesnt like fish.What do you do on Friday?第10页/共23页（二）四种基本句式I am a girl. 我是一个女生。He is smart. 他很聪明。Its tasty! 它可好吃了！（1

4、）判断句：什么是什么，什么怎么样。第11页/共23页I read a book. 我在看书。I have 6 teachers. 我有6个老师。He goes to school. 他去上学。A dog eats bread.有只狗在吃面包。（2）陈述句：谁干什么，谁有什么。第12页/共23页（3）否定句：含有“not”的句子，表示“不”，“没”。He is not a teacher. 他不是老师。She isnt tall. 她不高。I dont know. 我不知道。Lucy does not have lunch.露西没吃中饭。Mike doesnt like math.迈克不喜欢数学

5、。第13页/共23页（4）疑问句：“吗？”，“呢？”一般疑问句：把be动词或者助动词（do/does）提前。Am I a good teacher?我是一个好老师吗？Is he funny?他幽默吗？Do you like music?你喜欢音乐吗？Does she have a ruler?她有尺子吗？第14页/共23页特殊疑问句：含有疑问词的问句。疑问词：What When Why Who Where How5W.H What：什么 What do you have on Monday？ When：什么时候 When do you have computer class？第15页/共23页

6、Why：为什么 Why do you like ice-cream？Who:谁 Whos your mother?Where: 哪里 Where do you go？How：怎样 How is your Chinese teacher？第16页/共23页（5）句式转换判断句陈述句否定句否定句疑问句疑问句第17页/共23页判断句变否定句：Helen is a beautiful girl.Helen is not a beautiful girl.Jim is thin.Jim isnt thin.判断句变疑问句：Is Helen a beautiful girl?Is Jim thin?第18

7、页/共23页陈述句变否定句：陈述句变否定句：I like apples.I dont like apples.He plays computer game.He doesnt play computer game.陈述句变一般疑问句：陈述句变一般疑问句：a.Do you like apples?b.Does he play computer game?第19页/共23页陈述句变特殊疑问句：a. He has art on Wednesday.有什么课：What do you have on Wednesday？什么时候有美术课：When does he have art？第20页/共23页b. Jim is my good friend.谁：Who is your good friend？c. I like bananas. They are tasty！为什么：Why do you like bananas？d. He goes to school. She is at home.什么地方：Where does he go？ Where