现在时态中be动词的用法课件.ppt

1、安徽省淮北市西园中学安徽省淮北市西园中学 任荷花任荷花be动词意思和用法很多，一般的意动词意思和用法很多，一般的意思是：思是：是是，有多种变化形式，有多种变化形式，is，am，are，was，were，being，been，to be.另外，另外，be动词还有动词还有成为成为的意思。根据句子中不同的人的意思。根据句子中不同的人称、数和时态，应该选择相应的称、数和时态，应该选择相应的be动词。现在时态中动词。现在时态中be动词有三动词有三种变化形式：种变化形式：am is are.我我 I 用用am，你，你you用用are，is用于他用于他/她她/它，它，单数单数is 复数复数 are（他们（他

2、们they 也用也用are 你们你们you 也用也用are）变问句变问句 be提前，提前，句尾问号（？）要配全句尾问号（？）要配全 变否定真容易，变否定真容易，be后加后加not为标记为标记否定疑问任你变，否定疑问任你变，句首大写莫迟疑句首大写莫迟疑现在时态有关现在时态有关be动词的使用口诀动词的使用口诀:I am a student.Are you Jenny?She is in Class 2.He is a teacher.They are my friends.We are Chinese.Kate and Jim are English.The keys are mine.我我 I

3、用用am，你，你you用用are，is用于他用于他/她她/它，单数它，单数is 复数复数 are（他们（他们they 也用也用are 你们你们you 也用也用are）我我 复数复数I 意思是意思是“我我”时，时，be动词用动词用am.如果只表示一个字母时，如果只表示一个字母时，be动词用动词用is.people:family，class 等等There are four people in my family.有一类名词，形式上是单数，意义上是复数（集体名词）。有一类名词，形式上是单数，意义上是复数（集体名词）。变问句变问句 be提前，提前，句尾问号（？）要配全句尾问号（？）要配全 变否定真容

4、易，变否定真容易，be后加后加not为标记为标记否定疑问任你变，否定疑问任你变，句首大写莫迟疑句首大写莫迟疑This is a ruler.This is not a ruler.isntIs this a ruler?Yes,it is./No,it isnt.否定句否定句:一般疑问句：一般疑问句：肯定和否定回答：肯定和否定回答：These are my parents.Are these your parents?Yes,they are./No,they arent.否定句否定句:一般疑问句：一般疑问句：肯定和否定回答：肯定和否定回答：These are not my parentsar

5、entThere are some apples on the table.There arent any apples on the table.Are there any apples on the table?Yes,there are./No,there arent.否定句否定句:一般疑问句：一般疑问句：肯定和否定回答：肯定和否定回答：缩略形式缩略形式:you are=yourehe is=heswe are=werethey are=theyreI am not=Im notis not=isntare not=arent )（否定缩略形式（否定缩略形式:I am=Imshe is=

6、shesit is=its1.I _from Australia.2.She _ a student.3.My parents _very busy every day.4.My family _ watching TV.5.His family _ a happy one.amisareareis6.Where _ your friends?7.Which dog _ yours?8.Ten and two _ twelve.isisare9.How _ your father?10.Whose dress _ this?isis 11.A set of keys _ on the desk

7、.12.Some keys _ on the desk.areis13.Whose socks _ they?14.Here _ a scarf for you.15.Here _ some sweaters for you.areisare 16.There _ some apples on the tree.17.There _ some bread on the plate.areisis18.There _a ruler and a pen on the desk.19.A ruler and a pen _ on the desk.isare20.“I”_ the ninth let

8、ter in the ABC.二、句型转换：二、句型转换：1.They are doing homework.(否定句和一般疑问句否定句和一般疑问句)They are not doing homework.arentAre they doing homework?Yes,they are./No,they arent.2I am a student.(否定句和一般疑问句及否定句和一般疑问句及 肯定和否定回答肯定和否定回答)I am not a student.Are you a student?Yes,I am./No,Im not.Im not3.Tom is under the tree.（变为否定句和一般疑问句）（变为否定句和一般疑问句）4.The tigers teeth are sharp.（变一般疑问句并作肯定回答）（变一般疑问句并作肯定回答）Tom is not under the tree.isntIs Tom under the tree?Yes,he is./No,he isnt.Are the tigers teeth sharp?Yes,they are.