外研版初二上英语知识点时态篇精讲
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外研版初二上英语知识点时态篇
一.主要时态
1.当有always,usually,often,sometimes,seldom,never,once a,every时用一般现在时态。
时态构成:
Be动词或行为动词
主语为第三人称单数时:动词用第三人称单数式(is、has、v+s/es);
主语为一、二人称时动词用原形。
否定形式:be动词(am、is、are)+not
行为动词前+don't
主语为第三人称单数+doesn't同时把行为动词还原成原形形式
一般疑问句:be提前
2.当有now,at the moment,look,listen时用现在进行时态。
时态构成:Be(am,is ,are)+v-ing
3.当有Tomorrow,the day after tomorrow,from now on,in+一段时间,some day,next时用一般将来时态。时态构成为:will+v.或be going to+v.
4.当有yesterday,......ago,last......,just now......用一般过去时
时态构成:v.+ed
二.重要时态
1.一般现在时:
时态含义:表示经常性、习惯性的动作、状态。
时态使用场合:
(1)表示经常习惯的行为状态
Nick doesn’t do his homework on Sundays.
I go to school by bus everyday.
(2)表示普遍真理和客观事实。
Beijing lies in the east of China.
The sun rises from the east.
(3)用于时间及条件状语从句中。
用于时间状语从句中(when、while、before、after、until、as soon as等引导):
I will phone you as soon as i get home.
用于条件状语从句中:If you smile to the world,the world will smile back.
If you are a tear in my eye,i will never cry.
(4)用于时间表中:如列车时刻表、航班出发时间表。
The train leaves for Beijing at 9 o’clock in the morning.
(5)用于倒装句,表立即要发生的动作。
Here comes the bus.
There goes bell/
There goes the sunshine,here comes the rain.
2.一般过去时:
时态含义:过去经常性、习惯性的动作;过去某时发生的动作或存在的状态。
时态使用场合:
在以下时间状语下:long long ago,once upon a time,in 1989,at the age of five,last year/month/week/night,the day before yesterday,yesterday,ago
(1)时态构成:be动词(was/were)或行为动词(v.+ed)
否定形式:be(was/were)+not
行为动词前+didn't同时把行为动词还原为动词原形
一般疑问句:be(was/were)提前;did提前同时把行为动词还原为动词原形。
例句:
We had a party last Friday.
The cat caught a bird last night.
I made a model ship with Mike yesterday.
He lived in Tianjin two years ago.
3.现在进行时
时态含义:表示说话时或现阶段正进行得动作、行为。
在以下时间状语下:
Now,at this time,at the moment,these days,look,listen.
时态构成:be(am,is,are)+v.-ing
否定形式:be(am,is,are)+not+v.-ing
一般疑问句:be提前
I'm listening to the music now.
Listen!Annie is singing in the classroom.
Look!Mr.lee is running on the playground.
It’s getting colder and colder.
4.一般将来时态
时态含义:将来某时要发生的动作或存在状态,将来经常、反复发生的动作。
以下时间状语下:
关键词:next (next day/week/month/term/year)
tomorrow (tomorrow morning/afternoon/evening/the day after tomorrow)
this (Friday/week/weekend/weekday),
in (in two days/years)
时态构成:will+v.
Be going to+v.
否定形式:will not+v.
Be not gong to+v.
一般疑问句:will/be提前
I will learn a new lesson today.
Maria will wash her clothes after seven.
John will stay in Shanghai for a week.
Will she come?
The meeting won’t last long.
We won’t be busy this evening.