一般现在时专题讲解1．概念：一般现在时表示经常的、习惯性的动作或存在的状态一般现在时表示现在经常反复发生的动作、存在的状态或习惯性的动作的时态。
可概括为①经常性或习惯性动作；②长期存在的特征或状态；③普遍真理、客观事实等。
2．构成：一般现在时的构成主要有两种形式,一般现在时用行为动词的原形，但第三人称单数作主语时，动词的词尾要加-S。
：（1）be型：句子的谓语动词只有be（am，is或are）：a．肯定句中，只出现be，如： I am a student．我是一名学生。
b．否定句中，要在be后面加not，如： She isn't a teacher．她不是教师。
c．一般疑问句，要将be放在句子开头（注意句首字母大写），句尾用问号，答语用Y es，主语+be．或No，主语+be+not．如：—Are you ready？—你准备好了吗？—Y es，I am．—是的，我准备好了。
（—No，I'm not．—不，我没准备好。
）（2）实义动词型：句中的谓语动词为实义动词（也叫行为动词）：a．肯定句中，只出现实义动词，如： I get up in the morning．我早晨起床。
b．否定句中，要在实义动词前面加do（does）＋not，do（does）作助动词，本身无意义，常与not缩写成don't（doesn't），如： I don't like vegetables．我不喜欢蔬菜。
c．一般疑问句，要在句子开头加助动词Do（does），句尾用问号，简略答语用Y es，主语+do（does）．或No，主语+do （does）＋not．如：—Do you like oranges？—你喜欢桔子吗？—Y es，I do．—是的，我喜欢。
（—No，I don't．—不，我不喜欢。
）3, 一般现在时的用法1) 经常性或习惯性的动作，常与表示频率的时间状语连用。
时间状语： every…, sometimes, often, usually, always, at…, on Sunday I leave home for school at 7 every morning.2) 客观真理，客观存在，科学事实。
The earth moves around the sun. Shanghai lies in the east of China.3) 表示格言或警句中。
Pride goes before a fall. 骄者必败。
注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。
例：Columbus proved that the earth is round..4) if 条件句或when等时间状语从句主将从现第三人称单数的用法在一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或-e s。
但有些同学们对于哪些主语是第三人称单数还不十分清楚，现归纳总结如下：一、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。
二、单个人名、地名或称呼作主语；是第三人称单数。
如：①Han Mei looks like her mother. 韩梅看起来像她的母亲。
②Beijing is in China. 北京在中国。
③Uncle Wang often makes cakes. 王叔叔经常做蛋糕。
三、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。
如：①A horse is a useful animal. 马是有用的动物。
②This book is yours. 这本书是你的。
③That car is red. 那辆小汽车是红色的。
④The cat is Lucy's. 这只猫是露茜的。
四、不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时，是第三人称单数。
如：①Everyone is here. 大家到齐了。
②There is something wrong with the watch. 这块手表有毛病。
③This is a pen. 这是一支钢笔。
④That is an eraser. 那是一块橡皮擦。
五、不可数名词作主语时为第三人称单数。
如：①The milk is in the glass. 牛奶在玻璃杯里。
②The bread is very small. 那面包很小。
六、当数字或字母作主语时，看作第三人称单数。
如：①"6" is a lucky number. "6"是个吉利数字。
②"I" is a letter. "I"是个字母。
六、变化规则V+s; -ch,-sh,-s,-x,-o+es; -辅音字母+y---y变i+es巩固练习题：写出下列动词的第三人称单数形式1. work__________ read__________ clean__________ write__________2. teach__________ wash__________ guess__________ watch__________pass __________ fix __________3. go__________ do___________4. study__________ fly__________ cry__________ play__________ carry __________5. have__________一般现在时疑问、否定句专练一、写出下列动词的第三人称单数形式work__________ do___________ fly__________ cry__________ teach__________ carry __________ wash__________ read__________ clean__________ pass __________ fix __________ write__________ guess__________ watch__________ go__________ study__________ play__________ have__________二、把下列句子改为疑问句、否定句1. He often has dinner at home._________ he often _________ dinner at home?He_________ often _________ dinner at home.What _________ he often _________ at home?2. Daniel and Tommy are members of the Reading Club._________Daniel and Tommy members of the Reading Club?Daniel and Tommy_________ members of the Reading Club.3. She and I take a walk together every evening._________ she and _________ take a walk together every evening?She and I _________ _________ a walk together every evening.How often_________ she and _________ take a walk together ?4. There is some water in the bottle._________there _________ water in the bottle.?There ________ _________ water in the bottle.5. W e watch TV on weekdays._________ _________ watch TV on weekdays.?W e _________ _________ TV on weekdays.What _________ _________ on weekdays.?6. Nick does his homework on Sundays._________Nick _________ his homework on Sundays?Nick _________ _________ his homework on Sundays.What _________Nick _________ on Sundays?7. T hey like reading._________ they _________reading?T hey _________ _________ reading.8. She likes the black bag very much ._________ she _________ the black bag very much ?She _________ _________ the black bag very much .What _________ she _________ very much ?9. My parents read newspapers every day?_________ _________ parents read newspapers every day?My parents _________ _________ newspapers every day. How often_________ _________ parents read newspapers? 10. The girl teaches us English on Sundays._________the girl _________ _________ English on Sundays? The girl _________ _________ _________ English on Sundays. What_________the girl _________ _________ on Sundays? 11. My classmate knows the man on the bike ._________ _________ classmate _________ the man on the bike ? My classmate _________ _________ the man on the bike .Who_________ _________ classmate _________ ?12. His sister usually goes to school at 7:00 am ._________his sister usually _________ to school at 7:00 am?His sister _________ usually _________ to school at 7:00 am . When _________his sister usually _________ to school ?13. Lin Tao likes his new sweater ._________Lin Tao _________ his new sweater ?Lin Tao _________ _________ his new sweater .What _________Lin Tao _________ ?14. The clothing shop is on sale ._________the clothing shop on sale?The clothing shop _________ on sale .15. Mary has some books ._________Mary has _________ books .Mary _________ _________ _________ books .16. He likes English ._________ he _________English ?He _________ _________English .17. I want to go to a movie ._________ _________ want to go to a movie?I _________ _________ to go to a movie .18. He knows the teacher’s name ._________he _________ the teacher’s name ?He _________ _________the teacher’s name .Whose name _________he _________ ?19. I eat apples every day._________ _________ eat apples every day?I _________ _________ apples every day.How often_________ _________ eat apples ?20. They go to school by bus every day._________they _________to school by bus every day?They _________ _________ to school by bus every day. How_________they _________to school every day?21. She gets up at six ._________ she _________ up at six ?She _________ _________up at six .When _________ she _________ up ?22. CoCo has eggs for breakfast._________ CoCo _________eggs for breakfast?CoCo _________ _________ eggs for breakfast.What _________ CoCo _________ for breakfast?23. David does his homework after school._________David _________his homework after school? David _________ _________ his homework after school. What_________David _________ after school?24. I often play football after school_________ _________ often play football after school?I _________ often _________ play football after schoolHow often_________ _________ play football after school? 25. .I have some books._________ _________ _________ _________ books?I _________ _________ _________ books.What _________ _________ _________ _________?26. Gao Shan’s sister likes playing table tennis._________Gao Shan’s sister likes playing table tennis.Gao Shan’s sister _________ _________ playing table tennis.27. She lives in a small town near New Y ork._________she _________ in a small town near New Y ork? She _________ _________ in a small town near New Y ork. Where_________she _________ ?28.I watch TV every day._________ _________ _________ TV every day?I _________ _________TV every day.How often _________ _________ _________ TV?29 . Nancy runs very fast_________Nancy _________very fast?Nancy _________ _________ very fast30.W e have four lessons in the morning._________ _________ _________ four lessons in the morning?W e _________ _________four lessons in the morning.How many lessons _________ _________ _________ in the morning?31.Daniel watches TV every evening._________Daniel _________ TV every evening?.Daniel _________ _________TV every evening.How often _________Daniel _________ TV ?32. I do my homework every day ._________ _________ _________ _________ homework every day ?I _________ _________ my homework every day .33. She likes milk._________she _________ milk?She _________ _________ milk.34. Mingming usually waters the flowers every day._________ Mingming usually _________ the flowers every day?Mingming _________ usually _________ the flowers every day.35. They are in Grade Six._________they in Grade Six?They _________ in Grade Six.What Grade_________they in?36. I usually do my homework in the evening._________ _________ usually _________ _________ homework in the evening? I_________ usually _________ my homework in the evening.37. They always play football after school._________ they always _________ football after school?.They _________ always _________ football after school.When_________ they always _________ football?.38. John often goes to school by taxi._________John often _________ to school by taxi?John _________ often _________ to school by taxi.How _________John often _________ to school?39.They sometimes sing English songs._________They sometimes sing English songs.39.They sometimes sing English songs.40. She likes drawing._________She likes drawing.40. She likes drawing.41. He watches TV every evening ._________ He watches TV every evening .41. He _________ _________ TV every evening .42. My mother goes to work by bike._________ My mother goes to work by bike.42. My mother _________ _________ to work by bike.43. Peter studies English every day._________Peter studies English every day.43. Peter studies _________ _________ other has a new car._________My mother has a new car.44. My mother _________ _________ a new car.45.Lucy does her homework in the afternoon._________Lucy does her homework in the afternoon.Lucy _________ _________ her homework in the afternoon.46. There are some pens in the box ._________there _________ pens in the box .46. There _________ _________ pens in the box .三、把下列句子改为特殊疑问句1. I usually play football on Friday afternoon.2. Su Yang usually washes some clothes on Saturday.3. His sister usually goes to school by bike at 7:00 am4. Tom does his homework at home.5. Lily and Lucy are fifteen years old now .6. He often has dinner at home.7. She and I take a walk together every evening.8. Nick does his homework on Sundays.9. It’s rainy.10. They go to school by bus every day.11. She gets up at six in the morning .12. CoCo has eggs for breakfast.13. David does his homework after school.14. I sometimes play football after school15..I have some books.16. Gao S han’s sister likes playing table tennis.17. She lives in a small town near New Y ork.18.W e have four lessons in the morning.19. They are in Grade Six.20. I usually do my homework in the evening.21. They always play football after school.22. John often goes to school by taxi.23.It takes me an hour to go to school every day.24. There are three people in my family.25.I’m in Class Two.26. My mother goes to work by bike.27. Peter studies English every day.28. Simon and his parents live in Italy.29. They sometimes sing English songs.30.Superman flies in the sky.31. W e have ten subjects(学科) have at school.32. The watch costs 100 yuan33. She likes the black bag very much .34. He feels well35. He likes red.一般现在时用法专练I一.用括号内动词的适当形式填空。