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2、否定句的构成
主语 + be + not + 其他
is not = isn’t am not= ’m not are not= aren’t
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• 1、Kitty isn’t (not) an English girl. • 2、We aren’t (not) students. • 3、I am not (not) from Taizhou. • 4、She isn’t (not) tall. • 5、Lucy and Lily aren（’t not）good
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• （三）.表示客观事实或真理
• The earth goes around the sun.
• The sun rises in the east. • （四）. 与一般现在时连用的时间状语：
often, always, sometimes, usually, every day/ week/year 等．
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二、一般现在时的构成
系动词be的一般现在时 实义（行为）动词的一
般现在时
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• （一）、系动词be的一般现在时
1、肯定句的构成： 主语 + be + 其他
The girl is my friend.
be 包 括 哪 些 ？
is am are
什么时候用is？ 什么时候用am？ 什么时候用are？
3. She_t_a_k_e_s_(take) Eddie for a walk after supper.
4. He_w_a_s_h_e_s_(wash) clothes with his hands.
5. Simon _p_a_ss_e_s_ (pass) the ball to Daniel.
什么时候加s，什么时候加es呢？
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• 1、大多数动词在词尾直接加s， 如read → reads
look→ looks play→ plays
2、以辅音字母加y结尾的动词，要先将y变为i， 再加es
如：fly →flies carry →carries study →studies
1. Jordan __p_la_y_s__(play) basketball.
He d__o_es_n_’_t_p_l_a_y_(not play) football.
2. I ___g_o___(go) swimming on Sunday.
But I__d_o_n_’_t _g_o___ (not go) shopping.
It doesn’t look like a hat. 5. She has a dog at home. (a cat)
She doesn’t have a cat at home.
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Complete the sentences. Use the proper verb forms in brackets
These boys like playing football.
The girl doesn’t （does not）read English every morning.
The girl reads English every morning.
什么时候用助动词do，什么时候用助动词does呢？
取
Model 2. He likes reading. (writing) He doesn’t like writing.
1. I like red. (green) I don’t like green.
2. They like apples. (oranges)
They don’t like oranges. 3. We take a bus to school every day. (walk to
决
于
主
2021/为复数时，用助动词do构成否定 • 当主语为单数时，用助动词does构成否定
注意：don’t 和 doesn’t 之后动词一定要用原形
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Change the following sentences after the models.
Model 1: I like fish. (meat) I don’t like meat.
→ Do you read English every morning?
Tom’s father listens to English on the radio every evening .
→ Does Tom’s father listen to English on the radio every evening?
school)
We don’t walk to school every day.
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3. His brother plays football after school. (play basketball)
His brother doesn’t play basketball. 4. It looks like a cat. (hat)
6. Miss Li_t_ea_c_h_e_s_ (teach) Chinese.
7. Look at the animal, it _h_a_s_（have） four legs.
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2、否定句的构成
主语 + 助动词（do/does）+not +行为动词原形 + 其他
These boys don’t（do not） like playing football.
→ Are you an English teacher?
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总结：含be的一般疑问句、否定句改写口诀
• 我用am，你用are，is连着她他它 • 单数名词用is，复数名词全用are • 变疑问往前提，句末问号莫丢弃， • 变否定更容易，be后not莫忘记， • 疑问否定任你变，句首大写莫迟疑！
改疑问句或否定句时，原句里的some要改成any
There are some books on the desk. (改为否定句)
→There aren’t any books on the desk.
→Are there any books on the desk?
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Why not buy some apples? 为什么不买些苹果呢?
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• 3. Daniel enjoys playing computer games.
• (改为一般疑问句并做肯定回答)
Does Daniel enjoy playing computer games?
Yes, he does.
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补充：some、any
• 一般说来，some 用于肯定句中，any 用于 否定句和疑问句中 。
• book
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（二）、行为动词的一般现在时 1、肯定句的构成
主语 + 行为动词 + 其他
These boys like playing football. The girl reads English every morning.
注意：当主语为第三人称单数时，
行为动词要加s或者es
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3、一般疑问句的构成
• 问句： Do your parents like English？ 肯答： Yes，they do. 否答： No，they don’t.
助动词 + 主语 + 动词原形 + 其它？
肯定回答用“Yes, 主语+ do/does.”
否定回答用“No, 主语+do not/does not.”
取决于主语是单数 还是复数
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• 主语为单数时――→ is • 主语为复数时――→ are • 主语为“I”时 ――→am
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Exercise
• 1、Kitty is an English girl. • 2、We are students. • 3、I am from Taizhou. • 4、She is tall. • 5、Lucy and Lily are good friends. • 6、Those chairs are broken. • 7、The bag is mine.
be + 主语 + 其它部分？
肯定回答：Yes，主语+be
否定回答：No，主语+be+not
注意：在回答时，主语要用相应的代词代替
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• Is Mary an English teacher? • 肯定回答： Yes,she is • 否定回答：No,she isn’t.
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含be 动词一般疑问句的改写
• 秘诀：一调二改三问号
一调：即把句中的be 调到主语前；
二改：改换主语称谓，即将句中的主 语I my mine we our ours等第一人称分别改 为相应的第二人称you your yours等；