Grammar:八大时态
一般现在时
1.表经常发生的事情、习惯性的动作。
It seldom rains here .
2.表内心活动感情等。
I don't think you are right.
3.陈述客观事实、客观真理。
The sun rises in the east .
日出东方。
The earth goes around the sun .
地球绕着太阳转。
Ten minus two is eight.
十减二等于八。
The United States lies by the west coast of the Pacific Ocean.
美国位于太平洋西岸。
Birds fly in the sky.
4.表预定的行为。
The train leaves at 9 .
5.描述状态、性质、特征、能力等等。
He can speak five foreign languages .
他能说五种外语。
That is a beautiful city .
那是座美丽的城市。
Changjiang River is one of the longest rivers in the world.
长江是世界上最长的河流之一。
She majors in music .
她主修音乐。
All my family love football .
我全家人都喜欢足球。
My sister is always ready to help others .
我妹妹总是乐于助人。
6. 主句为一般将来时, 时间或条件状语从句用一般现在时来表示将来要发生的动作。
I'll tell him the news when he comes back.
他回来时,我将告诉他这个消息。
If you take the job , they will talk with you in greater details.
如果你接受这份工作,他们将和你谈谈细节。
特殊用法:(一般现在时表示过去)
1. 用于某些动词(tell, say, hear, learn, gather等)表示不确定的过去时间。如:
I hear that he got married last month.
我听说他上个月结婚了。
Mary says you told her to come over here.
玛丽说是你让她到这儿来的。
2. 当要陈述一个客观事实时,有时即使有过去时间状语也可用一般现在时。如:
The story is set in the summer of 1937.
故事的背景是1937年夏天。
The story begins in the year 1937.
故事开始于1937年。
基本结构: 一般现在时除主语是第三人称单数时谓语动词要变三单外,其他形式用动词原形。
I go to school at 6 every morning.
每天早上我七点去上学。
Summer follows spring.
春天之后是夏天。
The sun rises in the east.
太阳从东方升起。
Pride goes before a fall.
骄者必败。
一般将来时
1. 要在将来的某个时间内发生,表示“将来的动作或状态”。
I shall / will not be free tomorrow.
2. 表说话人的意图、打算或某种可能性。
Who is going to speak first?
3.按计划要发生的动作或命令他人做某事。
The new bridge is to open to traffic in 3 days.
特殊用法(表示将来的五种常用非时态方式)
1. “be+不定式”:表示命令、安排、倾向或必须、义务等。
She is to play Juliet.
她扮演朱丽叶。
You are to make the necessary changes.
你要做出必要的改变。
2. “be about to + v.”:表示即将发生的动作,有“即将”的意思,但不能和具体的时间状语连用。
The package is about to come unwrapped.
那个包快散开了。
3. “be going + v.”:表示按计划或安排打算去做某事,或表示有迹象表明要发生某事。
We are going to call her this evening.
我们打算今晚给她打电话。
My sister’s going to have a baby this summer.
我姐姐今年夏天要生孩子。
4. 用现在进行时表示将来:主要表示按规定或时间预计要发生的事。
The students are leaving on Sunday.
学生们星期日出发。
We’re having a party next week.
我们下星期将开一个晚会。
5. 用一般现在时表示将来:表示按规定或时间预计要发生的事。
We have a holiday tomorrow.
我们明天放假。
The train leaves at 10:04 this evening.
火车今晚10:04分开。
基本结构:
1.由 will 加动词原形构成,当主语是第一人称时,也可以用 shall 加动词原形。
2. be going + v.:
Telephone me this evening. I’ll be at home.
今晚给我打电话,我会在家。
I’ll (shall/will) do a better job next time.
下次我要干得好些。
The car is going to start.
车开不了啦。
Oil and water will not mix.
油和水没法混在一起。
现在进行时
1.说话时正在发生的动作。
They are having a football match.
2.现阶段一直在进行的动作。
He is preparing for CET Band Six.
3.表示说话人的情感,如赞许、批评等。
She is often doing well at school.
4.表示在近期按计划或安排要发生的动作。
Are you staying here till next week?
5. 现在进行时表将来,主要表示按计划或安排要发生的动作。
They’re getting married next month.
基本结构:现在进行时由 am/is/are 加现在分词构成。
They’re having a meeting.
他们在开会。
I’m studying at an evening school.
我在上夜校。
You’re always interrupting me!
你老打断我的话!(抱怨)
My father is always losing his car keys.
我爸老丢车钥匙。(不满)
She’s always helping people.
她老是帮助别人。(赞扬)
过去进行时
1.表示过某时刻正在进行的动作。
At this moment yesterday, I was packing for camp.
2.用于故事的开头,交代故事发生的背景情况。
One night, he was typing in his study . Suddenly , a man broke …
3.表示在过去的未来时间要发生的动作。
We left there when it's getting dark
4.某一动作发生时另一动作正在发生,其中一个在由when或while引导的时间状语从句中。
while 引导时间状语从句叙述过去的动作时,从句常用过去进行时。
I read a magazine while I was waiting for the bus.
when 用作并列连词,意为“这时”,连接两分句时,短暂性动词用过去时,延续性动词用过去进行时。
I was reading a newspaper when he came in.
现在完成时
1. 表示截止现在业已完成的动作。
By now, I have collected all the data that I need.
2. 表示发生在过去而对现在产生影响、带来结果的动作。
I haven’t seen the film yet.
3. 表示过去发生的动作持续到现在,并可能还要延续。
I have learned English for 8 years.
注意:瞬间动词又叫非延续性动词、终止性动词,不可以接表示一段时间的状语,若要接,需要做一些相应的变换。瞬间动词的否定可用完成时,也可接表示一段时间的状语。
× He has come to Beijing since last year.
√ He has lived in Beijing since last year.
× He has joined the army for 3 years.
√ He has served in the army for 3 years.
√ He joined the army 3 years ago.
√ He has been a soldier for 3 years.
√ It is 3 years since he joined the army.
常见的瞬间动词有:come, go, get to/reach/arrive at, leave, buy, sell, open, close, get up, join/take part in, begin/start, return/give, borrow/lend, become/turn, bring/take, die, finish/end, receive/hear from, marry, break, lose, jump等。
过去完成时
1. 发生在“过去的过去”。
When I woke up, it had stopped raining.
2.与一个表示过去的时间状语连用。
Peter had collected more than 300 Chinese stamps by the time he was ten.
3.在过去某时刻之前开始一直延续到现在。
By the end of last year, he had worked in the factory for twenty years.
过去完成时的判断:
1. 由时间状语来判定
一般说来,各种时态都有特定的时间状语。与过去完成时连用的时间状语有:
by + 过去的时间点:I had finished reading the novel by nine o'clock last night.
by the end of + 过去的时间点:We had learned over two thousand English words by the end of last term.
before + 过去的时间点:They had planted six hundred trees before last Wednesday.
2. 由"过去的过去"来判定
宾语从句中:在told, said, knew, heard, thought等动词后的宾语从句。
She said that she had seen the film before.
状语从句中: 通常用在时间、条件、原因、方式等状语从句中。
When I got to the station, the train had already left. After he had finished his homework, he went to bed.
注意:before, after 引导的时间状语从句中,由于 before 和 after 本身已表达了动作的先后关系,若主、从句表示的动作紧密相连,则主、从句都用一般过去时。
Where did you study before you came here?
After he closed the door, he left the classroom.
表示意向的动词,hope, wish, expect, think, intend, mean, suppose等,用过去完成时表示"原本…,未能…"
We had hoped that you would come, but you didn't.
基本结构:由 had 加动词的过去分词构成。
She said she had never been to Paris.
When the police arrived, the thieves had run away.
过去将来时
1. 宾语从句或间接引语中。
He didn't expect that we would all be there.
2.表示过去习惯性的动作。
During that period, he would do this every day.
3.表示过去的愿望、倾向,多用于否定句。
They knew that we would never permit such a thing.
基本结构:过去将来时由would, was/were going to, was/were to was/were about to等加动词原形构成
I knew you would agree.
我知道你会同意的。
I said I would arrange everything.
我说我来安排一切。