英语各个态的句子结构及标志词
一、一般 
1.念:常、反复发生的作或行在的某种状况。一般动词原形表示。如主语为第三人称单数动词上要改第三人称单数形式。
2.: Always, usually, often, sometimes, every week (day, year, month…), once a week(day, year, month…),  on Sundays 
3.肯定形式动词+动词原形+其他 
4.否定形式:主+am/is/are +not+其他;
时态谓语动词为动词则为+do+not+动词原形+其他,
如主语为第三人称单数+does+not+动词原形+其他
(is not缩写:isnt,  are not缩写:arent, does not缩写: doesn’t , do not 缩写: don’t) 
5.一般疑:be+主+其他?  Do/Does+主+其他?
6. 例句: 1. I often have dinner at home..    我常在家吃
I don’t ofter have dinner at home. 
Do you often have dinner at home?
2.Tom likes singing.    姆喜唱歌。
Tom doesn’t like singing.   
Does Ton like singing?
3.He is always ready to help others.  他是准着去人。
He is not always ready to help others. 
Is he always ready to help otheres? 
二、 一般 
weigh的过去式1.念:去某个时间生的作或状态习惯性、常性的作、行。用动词表示。
2.时间状语:, yesterday, the day before yesterday, last week, last(year, night, month…), 时间词+ago,(two years ago), in/on+表示去的时间词( in 1989), just now(才), at the age of 5, one day, long long ago(很久以前), once upon a time(曾
3.基本结构:be动词(was, were);行为动词去式(助动词:did)
4.肯定形式:主+动词+其他 
5.否定形式:主+was/were +not+其他;  主+did not+动词原形+其他 (did not 缩写:didnt) 
6.一般疑:was或were放于句首;用助动词do的去式did 提,同时还原行为动词
即:was/were+主+其他?      Did+主+动词原形+其他?
7.例句:1. She came to help us last month.  上她来帮助了我
She did not come to help us last month. 
Did she come to help you last month? 
2. He was a student two years ago.    年前他是一名生。
He was not a student two years ago. 
Was he a student two years ago?
三.一般将来时
1.念:表示生的作或存在的状态及打算、计划或准做某事。
2.时间状语:Tomorrow, next day(week, month, year…),soon(很快), in a few minutes(几分之后),   by…(by 2000, 到2000年),the day after tomorrow, in+时间状语(in two hours 后),in the future(在将来)  in future(今,往后)
3.肯定结构:主+am/is/are +going to + 动词原形+其他;主+will/shall + 动词原形+其他. 
4.否定形式:主+am/is/are+not+ going to+动词原形 ;  +will/shall+not+动词原形+其他.
          (will not 缩写:wont  shall not 缩写:shant)
5.一般疑句:be放于句首;will/shall提到句首。
Be+主+going to+动词原形+其他?  Will/shall+主+动词原形+其他?
四.
1.念:表示现阶段或说话时正在行的作及行。 
2.时间状语:Now, at this time(此), at this moment(此刻), look, listen, at present, these days, this week 
3.肯定形式:主+be +doing +其他 
4.否定形式:主+be +not +doing+其他 
5.一般疑:把be动词放于句首。 Be+主+doing+其他?
6.例句:
1. They are going to have a competition(竞赛) with us in studies.
要和我班在学习行一次竞赛
They are not going to have a competition with us in studies.
    Are they going to have a competition with us in studies? 
2. It will/shall rain in a few minutes.  几分之后要下雨了。
It will/shall not reain in a few minutes.
Will/Shall it rain in a few minutes?
7. 不用动词
1) 实状态动词:have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continue
  I have two brothers.
This house belongs to my sister.
2) 心理状态动词: know, realize, think see, believe, suppose, imagine, agree, recognize, remember, want, need, forget, prefer, mean, understand, love, hate
I need your help.
He loves her very much.
3 ) 间动词:accept, receive, complete, finish, give, allow, decide, refuse.
I accept your advice.
4)动词:seem, remain, lie, see, hear, smell, feel, taste, get, become, turn
You seem a little tired.
   
五.
1. 念:主要表示去某一刻正在行的作,或表示去某一段一直在行的
2. 的主要用法是描述一件事生的背景;一个长动生的候,另一生。
3. 常用的时间状语: just then(那), at this time yesterday, yesterday afternoon, at that time, this morning, the whole morning, the whole morning, all day yesterday, from nine to ten last evening, those days或以when, while谓语动词是一般时间状语等。
4. 时结构
was/were  + 动词在分
否定句在was/were后加一not,疑was/were提前可。
如:He was reading a book at 5:00pm yesterday.
    →He was not reading a book at 5:00 yesterday.
→Was he reading a book at 5:00 yesterday?  (Yes, he was./ No, he wasnt.)
→What was he doing at 5:00 yesterday?
5. 和一般
1)表示去某正在行的,而一般时则表示一完成的。也就是用一般,只表示有过这件事;用调动作的连续性。
I wrote a letter this morning.  今天上午我了一封信。(信完了)
I was writing a letter this morning.  今天上午我在一封信。(信不一定完)
The children watched TV yesterday evening.  昨天上孩子看了电视。(强调过生了件事)
The children were watching TV yesterday evening.  孩子都在看电视。(强电视这作的持性)
6.when和while的区别从属连词时都有“……候”之意,用法稍有不同:
1when引时间状语从句的谓语动词可以是短动词,也可以是延动词,而while引时间状语从句中的谓语动词只能是延动词
2when引谓语动词如果是短动词则用一般,主句是延动词则生在主句作的时间段之长动作用,短作用一般);如果主句和两个谓语动词都是延动词则全部用,这时when和while都可以用。

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