初中英语哪些知识点

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

　　I leave home for school at 7 every morning.

　　2) 客观真理,客观存在,科学事实.

　　The earth moves around the sun.

　　Shanghai lies in the east of China.

　　3) 表示格言或警句中

　　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..

　　4) 现在时刻的状态、能力、性格、个性.

　　I don’t want so much.

　　Ann Wang writes good English but does not speak well.

　　比较：Now I put the sugar in the cup.

　　I am doing my homework now.

　　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.再如：Now watch me, I switch on the current and stand back. 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.

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.

　　时间状语有：yesterday, last week, an hour ago, the other day, in 1982等.

　　Where did you go just now?

　　2)表示在过去一段时间内,经常性或习惯性的动作.

　　When I was a child, I often played football in the street.

　　Whenever the Browns went during their visit, they were given a warm welcome.

　　3)句型：

　　It is time for sb. to do sth "到……时间了" "该……了"

　　It is time sb. did sth. "时间已迟了" "早该……了"

　　It is time for you to go to bed. 你该睡觉了.

　　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’

　　I’d rather you came tomorrow.

　　4) wish, wonder, think, hope 等用过去时,作试探性的询问、请求、建议等.

　　I thought you might have some. 我以为你想要一些.

　　初中英语 篇2

1. Shall

　　1)表征询意见，用于第一、第三人称疑问句。Shall I get some tea? 我给你点茶好吗?

　　Shall the boy wait outside? 让那男孩在外面等吗?What shall we do this evening? 我们今晚做什么?

　　2)表说话人的意愿，有"命令、允诺、警告、决心"等意思，用于第二、第三人称陈述句。

　　You shall do as I say. 按我说的做。(命令)

　　You shall have my answer tomorrow. 你明天可以得到我的答复。

　　(允诺)He shall be sorry for it one day, I tell you. 有一天他会后悔的，我告诉你。

　　(警告)Nothing shall stop us from carrying out the plan. 什么也不能阻止我们执行这项计划。(决心)

2. Will

　　1)表意愿，用于各种人称陈述句。I will do anything for you. 我愿为你做任何事。

　　None is so blind as those who won't see. 不愿看的人眼最瞎。

　　If you will read the这本书，我会把它借给你。

　　2)表请求，用于疑问句。

　　Will you close the window? It's a bit cold. 请你把窗户关上好吗?有点冷。

　　Won't you drink some more coffee? 再来一点咖啡好吗?

　　3)表示某种倾向或习惯性动作。

　　Fish will die out of water. 鱼离开水就不能活。 The door won't open. 这门打不开。

　　The boy will sit there hour after hour looking at the traffic go by. 那男孩常常坐在那里好几个钟点，看着车辆行人通过。

3. Should

　　1)表义务。意为"应该"(某件事宜于做)，用于各种人称。

　　You should be polite to your teachers. 你对老师应该有礼貌。You shouldn't waste any time. 你不应该浪费时间。

　　2)表推测，意为"想必一定、照说应该、估计"等。

　　The film should be very good as it is starring first-class actors. 这部新电影是一流演员主演的，估计拍得很好。They should be home by now. 照说他们现在应当已经到家了。

4.Would

　　1)表意I said I would do anything for you. 我说过我愿意为你做任何事。

　　2)表委婉地提出请求、建议或看法。Would you like another glass of beer? 再来杯啤酒好吗?