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1、般现在时讲解一、定义与讲解 一般现在时：表示经常性的事情，经常性的动作或一般性事实。时间状语：often经常，usually通常，always总是every每个sometimes有时，at 在几点钟 只有在第三人称单数用动词的 “三单变化 ”，其他用动词的原形。三单变化： 1.（ 1）直接在动词词尾加 -s ask-askswork-works（ 2）以字母 s, x, ch, sh 或 o 结尾的动词，在词尾直接加 -es watch-watchesgo-goes y为i再力口 -es.fly-flieswish-wishesfix-fixesdo-does(3)以 辅音字母加-y”结尾的动
2、词，要先变 try-triesstudy-studies cry-cries2. 不规则变化：be is are have has般现在时用法1. 表示经常性， 习惯性 ,永久性的动作或存在的状态.通常与副词 sometimes,often, usually, always,every day (year, month ), once (twice, three times) a day, 等时间状语连用。They usually go to school by bike. I take the medicine three times a day.2. 表示客观真理，科学原理，自然现象，等客
3、观事实或格言，谚语等。The sun rises in the east and sets in the west every day.三、第三人称单数变化，现归纳总结如下：1. 人称代词he, she, it是第三人称单数。如：He likes watching TV.他喜欢看 电视。She has lunch at twelve. 她十二点吃午餐。It looks like a cat. 它看起来像只猫。2. 单个人名、地名或称呼作主语；用第三人称单数。如： Han Mei looks like her mother.韩梅看起来像她的母亲。 Beijing is in China.北京在中
4、国。 Uncle Wang often makes cakes.王叔叔经常做蛋糕。3. 单数可数名词或 this / that / the/ a + 单数可数名词 作主语时，是第三人称单数。如： A horse is a useful animal.马是有用的动物。This book is yours.这本书是你的。 That car is red.那辆小汽车是红色的。The cat is Lucys.这只猫是露茜的。4. 不定代词 someone, somebody, nobody, everything, somethin等及指示代词 this, that 作主语 时，视为第三人称单数。
5、Everyo ne is here.大家到齐了。 There is someth ing wrong with the watch .这块手表有毛病。 This is a pen.这是一支钢笔。 That is an eraser.5. 不可数名词作主语时为第三人称单数。女口：The milk is in the glass.6. 当数字或字母作主语时，看作第三人称单数。如6 is a lucky number.6I is a letter.三、一般现在时的句子转换：（1）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 等等 ）提到主语的前 面变成疑问句
6、; 在 be 动词或情态动词后面加 not 变成否定句 .例：陈述句：She is a student. 疑问句 Is she a student? 否定句 She is not a student. 陈述句：I can swim. 疑问句 Can you swi m 否定句 I can not swi m.（2）当句子中即没有be动词，也没有情态动词时，则在主语前加助动词 do （you,以及复数）,does （单数she,he,it）变成问句；在主语后谓语动词前加助动词don （I,you,以及复数）,doesn t（单数she,he,it）变成否定句，助动词后的动词要变成动词原形。例:陈
7、述句： We get up at 7:00 every morning.疑问句 Do you get up at 7:00 every morning? 否定句 tWe don t get up at 700 every morning.陈述句：She has a little brother.疑问句 t Does she have a little brother否定句 t She doesn t have a little brother专项练习写出下列动词的第三人称单数形式。meet go bring make lookhave pass take come watchdo fly st
8、udy need teach用括号内动词的适当形式填空。1. He ofte n(have) dinner at home.2. We(n ot watch) TV on Mon day.3. Nick(not go) to the zoo on Sun day.4. they(like) the World Cup?5. Whatthey often(do) on Saturdays?6. your pare nts(read) n ewspapers every day?7. Miss Zhao(teach) us En glish on Sun days.8.She and I(take
9、) a walk together every eve ning.9. There(be) some water in the bottle.10. Mike(like) cooki ng.11. They(have) the same hobby.12. My aunt(look) after her baby carefully.13. You always(do) your homework well.14.1 (be) ill. I m staying in bed.15.She(go) to school from Mon day to Friday.16. Liu Tao(do)
10、n ot like PE.17. The child ofte n(watch) TV in the evening.18.Su Hai and Su Yang(have) eight less ons this term.19. HeTV every evening. (watch)20. Johnlike his father. (look)句型转换1.1 go to school by bus.(用 He 做主语)2. Kim plays baseball very well.( 变一般疑问句 )3. She plays sports every day.(变否定句 )4. David
11、doesn t like French.(变肯定句)5. They like watches.(变否定句 )6. Alan doesn t watch TV on school nights.(变肯定句)7. We have time to do it.(变否定句 )8. John has a car.(对戈U线部分提问) 9. Do you have a pencil?(把主语改成 she) 10.Sonia Hall likes hamburgers .(划线部分提问)11. I do my homework every day .(改为一般疑问句并作否定回答)you homework every day ? No,I12. She likes milk.(改为一般疑问句并作肯定回答) she milk?Yes.,she
