发布者:王显扬 所属单位:红岩小学 发布时间:2019-10-13 浏览数( -) 【举报】
一般现在时
一.定义
一般现在时是描述现在经常性的、习惯性的动作或存在的状态的时态
I often go to school at 7 o’clock.
I am a student.
二.结构
一般现在时由动词原形或动词的第三人称单数形式表示
I watch TV at home.
He watches TV at home.
三.形式 am
1. be动词的一般现在时 is
are
I-am
We-are
You(你)-are
You(你们)-are
He-is
She-is
It-is
They-are
Mary is a student.
He is at school.
I am a teacher.
2. 单数第三人称变化规则(have的第三人称单数形式是has)
一般情况 |
加-s |
eat-eats rise-rises |
以s, sh, ch, x, o, z结尾的动词 |
加-es |
teach-teaches discuss-discusses
|
以辅音字母加y结尾的动词 |
变y为ies |
carry-carries fly-flies |
四.应用
1. be动词的一般现在时
肯定句式:主语 + am / is / are + ...
否定句式:主语 + am / is / are + not + ...
一般疑问句式:Am / Is / Are + 主语 + ... ?
-肯定回答:Yes, 主语 + am / is / are
-否定回答:No, 主语 + am / is / are + not
(要注意在回答的句子中,主语必须是代词)
特殊疑问句式:疑问词 + am / is / are + 主语 + ... ?
(特殊疑问词: what, who, which, where, when, why)
Eg:John is a student.
John isn’t a student.
-Is John a student?
-Yes, he is. / No, he isn’t.
What is John?
2. 实义动词的一般现在时
肯定句式:主语 + 实义动词原形 / 第三人称单数+ ...
否定句式:主语 + don’t / doesn’t + 实义动词原形+ ...
一般疑问句式:Do/Does + 主语 + 实义动词原形+ ... ?
-肯定回答:Yes, 主语+ do/does.
-否定回答:No, 主语 + do not./does not.
特殊疑问句式:疑问词 + 一般疑问句式?
Eg:I work. / She works.
I don’t work. / She doesn’t work.
一Does she work?
一Yes, she does. / No, she doesn’t.
Where does she work?
应用原则1:表示经常、习惯性发生的动作或存在的状态,可以与often, usually, always, never, every day, once a week, sometimes, seldom, on/at weekends等表示时间的状语连用
Helen always smiles at us.
She usually goes to school early.
应用原则2:表示普遍真理、客观存在及自然现象
The earth is round.
The moon moves around the earth.
应用原则3:表示已经预先计划或安排的肯定将要发生的动作,主要用于含有come, go, take place, start, begin, leave, return, stop, arrive at等非延续性动词的句子中,且句中常有表示将来时间的状语
The final exam takes place next week.
The train leaves London at six and arrives in Birmingham at eight.
应用原则4:在某些以here, there开头的句子中,用动词go, come的一般现在时表示正在发生的动作
Here comes the bus!
There goes the bell for class.