主要是时态和考点时态最好帮忙写出含义和例句考点主要告诉我高中考试一般考些什么 偏重于考哪些方面

主要是时态和考点时态最好帮忙写出含义和例句考点主要告诉我高中考试一般考些什么 偏重于考哪些方面
主要是时态和考点
时态最好帮忙写出含义和例句
考点主要告诉我高中考试一般考些什么 偏重于考哪些方面

主要是时态和考点时态最好帮忙写出含义和例句考点主要告诉我高中考试一般考些什么 偏重于考哪些方面
高中的主要时态是现在时、过去时、将来时、现在进行时、过去进行时、将来进行时、现在完成时、过去完成时、过去将来完成时、等.
一般现在时的用法
1） 经常性或习惯性的动作,常与表示频腮度的时间状语连用.时间状语： every…, sometimes, at…, on Sunday.例如：
I leave home for school at 7 every morning. 每天早上我七点离开家.
2） 客观真理,客观存在,科学事实.例如：
The earth moves around the sun. 地球绕太阳转动.
Shanghai lies in the east of China. 上海位于中国东部.
3） 表示格言或警句.例如：
Pride goes before a fall. 骄者必败.
注意：此用法如果出现在宾语从句中,即使主句是过去时,从句谓语也要用一般现在时.
例：Columbus proved that the earth is round. 哥伦布证实了地球是圆的.
4） 现在时刻的状态、能力、性格、个性.例如：
I don't want so much. 我不要那么多.
Ann writes good English but does not speak well. 安英语写得不错,讲的可不行.
比较：Now I put the sugar in the cup. 把糖放入杯子.
I am doing my homework now. 我正在做功课.
第一句用一般现在时,用于操作演示或指导说明的示范性动作,表示言行的瞬间动作.第二句中的now是进行时的标志,表示正在进行的动作的客观状况,所以后句用一般现在时.
2 一般过去时的用法
1）在确定的过去时间里所发生的动作或存在的状态.例如：时间状语有：yesterday, last week, an hour ago, the other day, in 1982等.例如：
Where did you go just now? 刚才你上哪儿去了?
2）表示在过去一段时间内,经常性或习惯性的动作.例如：
When I was a child, I often played football in the street. 我是个孩子的时候,常在马路上踢足球.
Whenever the Browns went during their visit, they were given a warm welcome.
那时,布朗一家无论什么时候去,都受到热烈欢迎.
3）句型：It is time for sb. to do sth "到……时间了" "该……了".例如：It is time for you to go to bed. 你该睡觉了.
It is time that sb. did sth. "时间已迟了" "早该……了" ,例如It is time you went to bed. 你早该睡觉了.
would （had） rather sb. did sth. 表示'宁愿某人做某事'.例如：I'd rather you came tomorrow.还是明天来吧.
4） wish, wonder, think, hope 等用过去时,作试探性的询问、请求、建议等,而一般过去时表示的动作或状态都已成为过去,现已不复存在.例如：I thought you might have some. 我以为你想要一些.
比较：Christine was an invalid all her life.（含义：她已不在人间.）
Christine has been an invalid all her life.（含义：她现在还活着）
Mrs. Darby lived in Kentucky for seven years. （含义：达比太太已不再住在肯塔基州.）
Mrs. Darby has lived in Kentucky for seven years. （含义：现在还住在肯塔基州,有可能指刚离去）
注意： 用过去时表示现在,表示委婉语气.
1）动词want, hope, wonder, think, intend 等.例如：
Did you want anything else? 您还要些什么吗?
I wondered if you could help me. 能不能帮我一下.
2）情态动词 could, would.例如：
Could you lend me your bike? 你的自行车,能借用一些吗?
4 一般将来时
1） shall用于第一人称,常被will 所代替.will 在陈述句中用于各人称,在征求意见时常用于第二人称.例如：
Which paragraph shall I read first? 我先读哪一段呢?
Will you be at home at seven this evening? 今晚七点回家好吗?
2） be going to +不定式,表示将来.
a. 主语的意图,即将做某事.例如：What are you going to do tomorrow? 明天打算作什么呢?
b. 计划,安排要发生的事.例如：The play is going to be produced next month.这出戏下月开播.
c. 有迹象要发生的事.例如：Look at the dark clouds, there is going to be a storm. 看那乌云,快要下雨了.
3） be +不定式表将来,按计划或正式安排将发生的事.例如：
We are to discuss the report next Saturday.我们下星期六讨论这份报告.
4） be about to +不定式,意为马上做某事.例如：
He is about to leave for Beijing. 他马上要去北京.
注意：be about to do 不能与tomorrow, next week 等表示明确将来时的时间状语连用.
用于现在完成时的句型
1）It is the first / second time. that…结构中的从句部分,用现在完成时.例如：
It is the first time that I have visited the city. 这是我第一次访问这城市.
This is the first time （that） I've heard him sing. 这是我第一次听他唱歌.
注意：It was the third time that the boy had been late.
2）This is +形容词最高级+that…结构,that 从句要用现在完成时.例如：
This is the best film that I've （ever） seen. 这是我看过的最好的电影.
典型例题
（1） ---Do you know our town at all?
---No, this is the first time I ___ here.
A. was B. have been C. came D. am coming
答案B. This is the first time 后面所加从句应为现在完成时,故选B.
（2） ---Have you ____ been to our town before?
---No, it's the first time I ___ here.
A. even, come B. even, have come C. ever, come D. ever, have come
答案D. ever意为曾经或无论何时,反意词为never,此两词常用于完成时.
注意：非延续性动词的否定形式可以与表示延续时间的状语连用.即动作不发生的状态是可以持续的.
（错）I have received his letter for a month.
（对）I haven't received his letter for almost a month.
过去完成时
1） 概念：表示过去的过去
----|----------|--------|----> 其构成是had +过去分词构成.
那时以前 那时 现在
2） 用法
a. 在told, said, knew, heard, thought等动词后的宾语从句.例如：
She said （that）she had never been to Paris. 她告诉我她曾去过巴黎.
b. 状语从句
在过去不同时间发生的两个动作中,发生在先,用过去完成时；发生在后,用一般过去时.例如：
When the police arrived, the thieves had run away. 警察到达时,小偷们早就跑了.
c. 表示意向的动词,如hope, wish, expect, think, intend, mean, suppose等,用过去完成时表示"原本…,未能…".例如：
We had hoped that you would come, but you didn't. 那时我们希望你能来,但是你没有来.
3） 过去完成时的时间状语before, by, until , when, after, once, as soon as.例如：
He said that he had learned some English before. 他说过他以前学过一些英语.
By the time he was twelve, Edison had began to make a living by himself. 到了十二岁那年,爱迪生开始自己谋生.
Tom was disappointed that most of the guests had left when he arrived at the party.
汤姆失望了,因为他到达晚会时,大部分客人已经走了.
典型例题
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written, left B,were writing, has left C. had written, had left D. were writing, had left
答案D. "把书忘在办公室"发生在"去取书"这一过去的动作之前,因此"忘了书"这一动作发生在过去的过去,用过去完成时.句中when表示的是时间的一点,表示在"同学们正忙于……"这一背景下,when所引导的动作发生.因此前一句应用过去进行时.
注意： had hardly… when 还没等…… 就…….例如：
I had hardly opened the door when I he hit me. 我刚打开门,他就打了我.
had no sooner…than 刚…… 就…….例如：
He had no sooner bought the car than he sold it. 他刚买了这辆车,转眼又卖了.