一般现在时的概念及例句
注意:一般现在时的谓语动词形式只有三种:
① 主语是I, 用动词原形
② 主语是you 及复数名词,用动词原形
③ 主语是单数名词或代词,动词要用第三人称单数形式
动词原形变三单形式:
一般直接在动词后加 “s”
以s, x, ch, sh, o结尾的动词一般直接加 “es”
例如:miss—misses, fix—fixes, teach—teaches, wish—wishes, do—does 等
以“辅音字母+y”结尾的动词要把 “y” 改为 “I” 再加 “es”,
例如:study—studies等
以 “元音字母 + y “ 结尾的动词直接在结尾加 “s”
例如:say—says, play—plays等
不规则的动词变第三人称单数形式: have—has,等
表示经常性或习惯性的动作。
I often get up early in the morning.(often一词说我习惯性地,经常性的早起,所用一般现在时,因为主语是I , 所以用动词原形get up)
She often gets up early in the morning.(同上,often提示要用一般现在时,又因为主语是第三人称she,所以动词用第三人称单数形式gets up)
把上面两个句子变为否定句: 如果句子中含有be动词(am, is, are)的话直接把be动词提前放在句子开头,其余按顺序照写。若句子中没有be动词,则需要借助一个助动词 “do” 来完成句子提问。
I often get up early in the morning. Do you often get up early in the morning (这里需要注意,如果主语是 “I” 的肯定句变成疑问句主语要变成 “you” )
She often gets up early in the morning. Does she often get up early in the morning.(这里需要注意的是,如果主语是第三人称名词或代词的话,助动词do 要变成动词的第三人称单数形式 does,否定形式为 does not=doesn’t. 此时真正实义动词(get up)保留原形)
表示长期存在的特征或状态。
I am a student.我是学生。(表状态,我是学生这一身份状态具有长期性)
I am not student. (否定句)
She is short.她很矮。(表特征)
变为疑问句:(直接把be动词提前)
根据原句子变是:Am I a student (很少几乎没有人这样问)
根据实际情况变是: Are you a student (符合实际情况)
因此:在陈述句变成疑问句的过程中,第一人称要变成第二人称。
Is she short
表示客观存在的真理、现象(格言,谚语,自然现象)
The early bird catches the worm.(谚语)
早起的鸟儿有虫吃。
The sun rises in the east and sets in the west.(自然现象)
太阳东升西落。
Time and tide wait for no man.(格言)
岁月不饶人。
练习:
用所给动词的适当形式填空。
He always ____________ (play) basketball with his friends after class.
She __________ (visit) her grandparents once a month.
They usually __________ (go) to school on foot.
One of the boys ________ (have) a black hat.
He said the sun _________(rise) from the east.
He _________ (play) football every day.
Jenny _______ (study) English very well.
John and Jenny usually ________ (go) to school at 7 o’clock.
Does Marry _______ (have) a good friend
The little boy together with his parents _____ (be) walking in the park.
二.根据汉语提示补充完整下列句子。
He often ______ ______ (看电视) at home.
She ______ (读书) every day.
Mike always _____ (尽力)his best to help others.
The girl sometimes ____ (去) to the hospital to see her grandfather.
Tom never _________ (吸烟) in public。
I don’t _________ (想要) so much.
The earth_________ (转动) around the sun.
Do you _________ (喜欢) this shirt
It often ________ (下雨) here.
I _____ (离开) home for school at 7 o’clock every day.