一般现在时的定义,构成,用法及练习题目

1、1. 一般现在时的概念一般现在时表示经常的、习惯性的动作或存在的状态.2. 一般现在时的构成一般现在时的构成主要有两种形式：(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.否认句中,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 Yes, 主语+be.或No ,主语+be+not.如:Are you ready? 你准备好了吗？ 一Yes , I am.一是的,我准备好了.(N

2、o, I'm not.一不,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.否认句中,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 Yes,主语+do(does).或 No ,主语+do(does)+no

3、t.如： Do you like oranges? 你喜欢桔子吗？Yes , I do.一是的,我喜欢.(No, I don't.一不,我不喜欢.)3. 一般现在时的用法1)经常性或习惯性的动作,常与表示频度的时间状语连用,如：every,sometimes,at ,on Sunda y 等.I leave home for school at 7 every morning. 我每天早上 7 点去上学.地球绕着太阳.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.上海

4、位于中国的东部.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现在时刻的状态、水平、性格、个性.Xiao Wang writes good English but does not speak well.小王的英语书面表达水平比口语好.比拟： Now I put the sugar in the cup.I am doing my homework now.第一句用一般现在时,用于操作演示或指导说

5、明的示范性动作,表示言行的瞬间动作. 再如： Now watch me, I switch on the current and stand back.第二句中的 now 是进行时的标志,表示正在进行的动作的客观状况,所以后句用一般现在时No. 1 1 一般现在时的定义及构成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.构成:主语+动词原形+宾语一般现在时用行为动词的原形,但第三人称单数作主语时,动词要用第三人称单数形式.一般的动词词尾+S.以sh/ch/s/x结尾的词+es.以辅音字母Y结尾的把Y变成i再+es.辅音字母+o结尾的+es.【No. 2一般现在时的应用在实际应

6、用中,一般现在时常与以下时间状语联用:),once aalways, usually, often, sometimes, every week (day, year, month week, on Sundays 例旬： He usually plays football on Sundays.没有时间状语,可以分以下四种类型：A. be 型这一类型由be动词+名词、形容词、副词、代词、数词或介词短语等一起构成谓语,表示主语的个性、特征或状态.如：I am a student.主语+be动词+名词They are hungry.主语+be动词+形容词He is out.主语+be动词+副词T

7、hat pen is mine.主语+be动词+代词I am fifteen.主语+be动词+数词The bike is under the tree.主语+be 动词 + 介词短语B. do 型do型由行为动词充当谓语,表示经常性或习惯性的动作,其构成为主语+动词原形或动词第三人称单数形式如： I know it. He believes me.C. there be 型there be型句子表示 存在,其构成为“there be土语+其他,表示客观事实.用法遵循 就近原那么,即主语是单数或并列主语中的第一个主语是单数,那么用there is ；主语是复数或并列主语中的第一个主语是复数,那么

8、用 there are.如：（1） There is an eraser on the teacher's desk. 主语 an eraser 是单数（2） There is an orange , five apples and eight bananas in the bag. 并歹!J主 语中的第一个主语an orange是单数D.情态动词型情态动词型句子的构成为 主语+情态动词+动词原形,情态动词和动词原形一 起构成谓语,表示说话人对所表达的动作或状态的看法.如： He can speak a little English.can+speak May I have a boo

9、k, please?may+have【No. 3一般现在时的变化否认形式：首先找句子中有没有be动词is, am或者are或情态动词can, 如果有,只要在be动词或情态动词后面加上not.如果句子中没有be动词is, am或者are或情态动词can那么根据主语在后面参加don' tyou,或者复 数或doesn '第三人称单数.一般疑问句：首先找句子中有没有be动词is, am或者are或情态动词 can,如果有,只要将be动词或情态动词提前,放到主语前面.注意：句 中第一人称和第二人称要互换.如果句子中没有 be动词is, am或者are或 情态动词can那么根据主语判断参

10、加doyou, I或者复数或does 第三人称 单数.注意：句中第一人称和第二人称也要互换.特殊疑问句：首先分析划线局部的意思,确定用哪个疑问词what, where, who, when, which, whose, how, how many, how much, what shape, whatcolour, what doing, where going, what ,然届战句子中有没有 be 动 词is, am或者are或情态动词can,如果有,只要将be动词或情态动词 放到主语前面疑问词的后面.如果句子中没有 be动词is, am或者are 或情态动词can那么根据主语判断参加do

11、you, I或者复数或does 第三人 称单数.注意：句中第一人称和第二人称也要互换.1. We oftenplay in the playgound.2. Heget up at six o' clock.3. youbrush your teeth every morning.4. What dohe usually doafter school?5. Dannystudy English,Chinese,Maths,Science and Art an school.6. Mike sometimesgo to the park with his sister.7. At eig

12、ht at night, shewatch TV with his parents.8. Mikeread English every day?9. How many lessons your classmatehave on Monday?10. What time his motherdo the housework?1. Do you often play football after school? 肯定答复2. I have many books.改为否认句改为一般疑问句3. Gao Shan ' s sister likes playing table tennis改为否认

13、句4. She lives in a small town near New York.5. I watch TV every day.改为一般疑问句6. David has got a goal.改为一般疑问句7. We have four lessons.否认句8. Nancy doesn ' t run fast 肯定句9. My dog runs fast.否认句：一般疑问句：10. Mike has two letters for him.一般疑问句：否认句：11. I usually play football on Friday afternoon.否认句：一般疑问句：划

14、线提问12. Su Yang usually washes some clothes on Saturday. 否认句：一般疑问句：划线提问：13. Mingming usually waters the flowers every day 否认句：般疑问句：划线提问14. Tom does his homework at home.否认句：一般疑问句：划线提问一般现在时练习题答案1. plays2. gets3. do brush4. does do5. studies6. goes7. watches8. does read9. does have10. does do11. do have改句子：Yes,I doI don ' t have many books.Gan shan s sisters doesn t like play table tennis.She doesn t live in a small village Near New york.Do you watch TV every day?Has David got a boat?We don t have four lesons.Nanry runs fast.My dog doesn't run fastDoes your dog ru