2022年11月23日发(作者:collar)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.多数在动词后+s play — plays like — likes
(1)直接在动词词尾加-s.
ask---asks work---works get---gets stay---stays
(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 fix---fixes do---does
go---goes pass---pass
(3)以“辅音字母加 - y”结尾的动词,要先变y为i再加-es.
try---tries study---studies cry---cries fly---flies
2.不规则变化:
be---- is are have----has
二、一般现在时用法
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.
She helps her mother once a week.
Mary’s father is a policeman.
There are 50 students in my class.
2. 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 ris in the east and ts in the west every day.
The man who has never been to the Great Wall is not a real man.
Tomorrow is Tuesday.
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;在be动词或情态动词后面加not变成否定句.
例:①陈述句:She is a student.
疑问句→ Is she a student?
否定句→ She is not a student.
②陈述句:I can swim.
疑问句→ Can you swim
否定句→ I can not swim.
(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’t(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:①陈述句:We get up at 7:00 every morning.
疑问句→Do you get up at 7:00 every morning?
否定句→We don’t get up at 7:00 every morning.
②陈述句:She has a little brother.
疑问句→ Does she have a little brother?
否定句→ She doesn’t have a little brother.
(一).用动词的适当形式填空
1. She _________(go) to school at ven o’clock.
2. It’s 6 o’clock. They are _________ (eat) supper.
3. He usually ___________ up
答)
2. I have many books. (改为否定句)
3. Gao Shan’s sister likes playing table tennis (改为否定句)
4. She lives in a small town near New York. (改为一般疑问句)
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.(否定句)
8. Nancy doesn’t run fast (肯定句)
9. My dog runs fast. 否定句:
一般疑问句:
10. Mike has two letters for him.一般疑问句:
否定句:
11. I usually (play football )on Friday afternoon.否定句:
一般疑问句:
括号内容提问
12. Su Yang usually washes some clothes on Saturday.
否定句:
一般疑问句:
划线提问:
13. Mingming usually waters the flowers every day
否定句:
一般疑问句:
划线提问
14. Tom does his homework at home.
否定句:
一般疑问句:
划线提问
一般现在时:表示通常性、规律性、习惯性的状态或者动作(有时间规律发生的事件)的一种时间状态
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-es。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。(口诀:I用am,you用are,is用于她他它,单数名词用is,复数名词都用are)
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 hor is a uful animal. 马是有用的动物。
②This book is yours. 这本书是你的。
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。
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。