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1、一般现在时,1,目录,一 定义二 谓语形式三 句式变换四 课堂练习,2,一 定义,一般现在时表示经常或习惯性的动作或一般性事实,也可表示现在的状态或主语具备的性格和能力。通常与副词every day（每天），always（总是）,usually（通常）,often（经常）sometimes（有时）,等时间状语连用。,3,（1）表示事物或人物的特征、状态。The sky is blue.天空是蓝色的。Marys father is an English teacher. 玛丽的爸爸是一名英语老师。 （2）表示经常性或习惯性的动作。I get up at six every day. 我每天六点起
2、床。 She plays sports every day. 她每天都做运动。,4,（3）表示客观现实。The table has four legs.桌子有四条腿。There are 50 students in my class. 我们班有50个学生。（4）表示客观真理，科学原理，自然现象，等客观事实或格言谚语等。 The sun rises in the east every day. 太阳每天从东方升起。The earth goes around the sun. 地球绕着太阳转。（5）表示平日的喜好。I like bananas. We dont like vegetables.He
3、 likes ice cream. She doesnt like strawberries.,5,二 一般现在时谓语,一般现在时谓语由动词原形表示,但主语为第三人称单数时,谓语动词要加S或ES,其变化规则如下: 动词三单形式的变化规则：1.（1）多数直接在动词词尾加-s. play plays like likes ask-asks work-works get-gets call-calls,6,（2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es.watch-watches wish-wishes do-does go-goes （3）以“辅音字母加 - y”结尾的动词
4、，要先变y为i再加-es.try-tries study-studies cry-cries fly-flies2.不规则变化：be- is have-has,7,归纳：第三人称单数,人称代词he, she, it是第三人称单数。He likes watching TV. 他喜欢看电视。 She has lunch at twelve. 她十二点吃午单个人名、地名或称呼作主语是第三人称单数。Han Mei likes salsd . 韩梅喜欢萨拉。 Beijing is in China. 北京在中国。 Uncle Wang often plays volleyball. 王叔叔经常打排球。,
5、8,单数可数名词或this / that / the+单数可数名词作主语时，是第三人称单数。 This book is yours. 这本书是你的。 That car is red. The cat is Lucys. 这只猫是露茜的。 不可数名词作主语时为第三人称单数。The milk（牛奶） is in the glass. 牛奶在玻璃杯里。 The bread is very small. 那面包很小。 当数字或字母作主语时，看作第三人称单数。 6 is a lucky number. 6是个吉利数字。 I is a letter. I是个字母。,9,EX2 1.Tom often_(
6、get ) up at six in the morning 2. The earth _( go) around the sun . 3.Marys parent _(live ) in Beijing . 4. She _ (draw) very well.,Ex1. 写出下列词的单三形式： look; go; give; fly; have,looks; goes; gives; flies; has,gets,goes,lives,draws,10,三 一般现在时的句子转换,一般现在时的构成： 肯定句：主语is/am/are其它成分.He is an office worker.主语(
7、除第三人称单数)动词原形其它成分.I get up at six every day . 主语(第三人称单数)动词s/es 其它成分. My father usually goes to work by bus.,11,1)变一般疑问句:当句子中有be动词或情态动词时,则把be动词或情态动词(can,could等)提到主语的前面 句式结构： Am/Is/Are+主语其它成分?肯定:Yes,主语+be.否定:No,主语+be+not.It is a tall tree.,Is it a tall tree?,Yes,it is./No,it is not.,12,注意：当句子中没有be动词，也没
8、有情态动词时，变一般疑问句时，在主语前加助动词do (I, we, you,以及复数), does（第三人称单数she,he,it等）变成问句；,13,Do +主语(除第三人称单数) 动词原形其它成分?肯定:Yes,主语+do.否定:No,主语+do+not.The Greens often go swimming in summer?,Do the Greens often go swimming in summer?,Yes,the Greens do./No,the Greens do not.,14,Does+主语（第三人称单数）动词原形其它成分?肯定：Yes,主语+does.否定：N
9、o,主语 +does+not.The earth goes around the sun.,Does the earth go around the sun ?,Yes,the earth does./No,the earth does not.,15,一般疑问句的回答：,注意：一般用什么问就用什么来回答。但以下例外：Is this a pencil? Yes,it is./ No, it isnt.Is that your backpack? Yes,it is./ No,it isnt.Are these your parents? Yes,theyre./ No, they arent.
10、Are those Jims brothers? Yes,theyre./ No,they arent.,16,1、He found some meat in the fridge.（变一般疑问句)_ he_ _ meat in the fridge?2、There was some orange in the cup.（变一般疑问句) _ there _ orange in the cup?,Did,find,any,Was,any,17,2）变否定句：在be动词或情态动词后面直接加not变成否定句. (be后not莫忘记)例：陈述句：She is my sister. 否定句 She is
11、 not my sister. 陈述句：I can play soccer. 否定句 I can not /cant play soccer.,18,注意：变否定句时，在主语后谓语动词前加助动词dont,doesnt变成否定句，切记：助动词后的动词则还原成动词原形。,陈述句：We get up（起床） at 7:00 every morning.否定句We dont get up at 7:00 every morning.陈述句：She has a brother.否定句 She doesnt have a brother.,19,3）特殊疑问句,句式结构：疑问词is/am/are +主语(
12、其它成分)？What time is it now? 疑问词do +主语动词原形(其它成分)？When do you usually go to bed? 疑问词does+主语（第三人称单数）+动词原形（其它成分）？Where does Jim do his homework on weekdays ?,20,Exercises,21,Is he happy?,Yes, he is happy.,Is he strong?Yes, he is strong.,22,What is it?It is a cat.,Is she busy?Yes, she is busy.,23,Am I sad
13、?No, I am happy.,Is it very hot?Yes, it is very hot.,24,He is happy.,否定句:一般疑问句:肯定回答:否定回答:,He is not (isnt) happy.,Is he happy?,Yes, he is.,No, he isnt.,25,I am happy.,否定句:一般疑问句:肯定回答:否定回答:,I am not happy.,Are you happy?,Yes, I am.,No, I am not.,疑问句要求把BE 提前，第一人称变成第二人称。,26,They are in the classroom.,否定
14、句:一般疑问句:肯定回答: 否定回答:,They are not (arent) in the classroom.,Are they in the classroom?,Yes, they are.,No, they arent.,27,动词be一般现在时的构成,28,get up,water the flowers,I get up at 6:35 in the morning.,She waters the flowers.,29,play football,watch TV,They play football in the playground.,He watches TV in t
15、he sitting-room.,30,否定句:一般疑问句:肯定回答:否定回答:,I get up at 6:35 in the morning.,I do not (dont) get up at 6:35 in the morning.,Do you get up at 6:35 in the morning?,Yes, I do.,No, I dont.,对于实意动词，疑问句要求：当主语是他(he)，她(she)，它(it)时，句子前面加DOES，并把动词恢复原形；当主语是其他人称时，句前加DO ，第一人(I/we) 称换第二人称(you)。,31,They play football
16、in the playground.,否定句: 一般疑问句: 肯定回答:否定回答:,They do not (dont) play football in the playground.,No, they dont.,Yes, they do.,Do they play football in the playground?,32,Ex1. 将下列各句从肯定式改为否定式,I talk to Peter because I like him.Kate comes from America. Kate works with PeterI am Chinese, and I am a student
17、.They know each other.,I dont talk to Peter because I dont like him.,Kate doesnt come from America.Kate doesnt work with Peter.,I am not Chinese, and I am not a student,They dont know each other.,33,1.Her parents live in Shanghai .否: Her parents_ in Shanghai.疑： _ her parents_ in Shanghai?.2.You stud
18、y English .否： You study English .疑： you study English ? 3. How often Tom football?A.is ,play B. do,play C. does, play D.does,plays,dont live,Do,live,do,Do,C,34,1. Jim usually _ ( have ) lunch at home.2. Li Guanhua _ ( be ) twenty years old.3. How many students _ ( be ) there in your class?4. -_ she _ ( study ) hard? -Yes, she _.5. Lucy and lily _ ( not speak ) Chinese.6. My father _ ( not do ) morning exercises every day.7. She always _ ( wash ) her clothes on Sundays.8. _ your brother _ ( like ) playing football? No, he _.,用所给动词一般现在时态填空:,35,
