高三英语课前预习的知识点分析
英语学习首先是一种“模仿”，因此准确、大量的记忆是学好英语的基础和前提。为了减少遗忘，提高记忆的效率，同学们在日常的学习中应做到“过度”学习，及时复习，循环往复，不留“夹生饭”。以下是小编给大家整理的高三英语课前预习的知识点分析，希望大家能够喜欢!
高三英语课前预习的知识点分析1
一.主语从句
主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。
1. It 作形式主语和it引导强调句的比较。
It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人是也可用who/whom。
例如：
It is a pity that you didn’t go to see the film.
It doesn’t interest me whether you succeed or not.
It is in the morning that the murder took place.
It is John that broke the window.
2. 用it 作形式主语的结构。
(1) It is +名词+从句
It is a fact that … 事实是…
It is an honor that …非常荣幸
It is common knowledge that …是常识
(2) it is +形容词+从句
It is natural that… 很自然…
It is strange that… 奇怪的是…
(3) it is +不及物动词+从句
It seems that… 似乎…
It happened that… 碰巧…
(4) it +过去分词+从句
It is reported that… 据报道…
It has been proved that… 已证实…
3. 主语从句不可位于句首的五种情况。
(1) if 引导的主语从句不可居于复合句句首。
(2) It is said ， (reported) …结构中的主语从句不可提前。
例如：
It is said that President Jingo will visit our school next week. (right)
That President Jiang will visit our school next week is said. (wrong)
(3) It happens…， It occurs… 结构中的主语从句不可提前。
例如：
It occurred to him that he failed in the examination. (right)
That he failed in the examination occurred to him. (wrong)
(4) It doesn’t matter how/whether …结构中的主语从句不可提前。
例如：
It doesn’t matter whether he is wrong or not. (right)
Whether he is wrong or not doesn’t matter. (wrong)
(5) 含主语从句的复合句是疑问句时，主语从句不可提前。
例如：
Is it likely that it will rain in the evening? (right)
Is that will rain in the evening likely? (wrong)
4. What 与that 在引导主语从句时的区别。
What 引导主语从句时在句时在从句中充当句子成分，如主语.宾语.表语，而that 则不然。
例如：
1) What you said yesterday is right.
2) That she is still alive is a consolation.
高三英语课前预习的知识点分析2
Computers
一、重点短语
1. in common 共同的in common with 和…一样 We have much/a lot /nothing /little /something in common.我们有很多/没有/几乎没有/有一些相似之处。
2.put… in order把…排序in order按顺序; 整齐out of order次序紊乱;(机器等)失灵; 出故障
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3. compare …with…把…与…想比 compare …to… 把…比作… compared with与…想比
4. over time 久而久之 5.begin as作为…开始 6. technological revolution科技革命
7. from then on. 从那时起 from now on 从现在起 8. artificial intelligence 人工智能
9. in size and in brainpower 在体积和脑容量上 10.as a result结果as a result of作为…的结果
11. go by(时间)流逝，过去 pass by经过 12. human beings, human race, mankind人类
13. provide sb. with sth.= provide sth. for sb.给某人提供某物 14.be filled with充满
14. a life of high quality高质量生活 15. in reality事实上16. be crazy about?痴迷于，醉心于
17. do research into 进行?的研究 18. have a good shot for a goal. 好好地射一个球
19. a devoted friend一个忠实朋友 20. be connected with …与…有联系 21. get together 聚会
22.make up 组成，构成
23.in the early 1960s在20世纪 60 年代早期 24. on the football team在球队中
25. come true 实现，达到 My dream comes true.我梦想成真。realize one’s dream 实现梦想
26. in a way=in one way=in some ways从某种程度上说，从某些方面来说in the/one’s way挡路,碍事 on the/one’s way to …在去…的路上in this way用这种方法by the way 顺便提一下 by way of London 途经伦敦 lose one's way 迷路, 迷失方向 in no way绝不
27. after all毕竟，终究 in all=in total总共 above all尤其重要的是，首先 first of all首先，起初 not at all根本不，一点也不 all in all 总之
28. by oneself=on one’s own独自 29. watch over 看守，照管，监视 30.mobile phone手机
31. with the help of在…的帮助下 32. what’s more=in addition 更重要的是，而且，另外
二、重点句型
1. ?it nearly took two hundred years before I was built as an analytical machine?差不多到了200年之后我才被做成分析机。
It takes/took/be+时间段+before… “多久之后才…”
2. As time went by. 随着时间的推移。
三、语法----被动语态
(一)概念：主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。
(二)各种时态被动语态的形式
1.一般现在时的被动语态 am/is/are + done
2.一般过去时的被动语态 was/were + done
3.一般将来时的被动语态 ⑴will/shall be done ⑵be going to be done ⑶be to be done
4.现在进行时的被动语态 is/am/are + being + done
表示说话人说话时或现阶段正在进行的动作，经常和时间副词now (现在), right now (现在, 此刻), at present (现在,目前), at this moment (此刻)连用。
5.现在完成时的被动 have/has been done
现在完成时常与already, always, often, ever, never, yet, not...yet, just等不表示明确的时间副词连用, 还可以和表示时间一直延续到目前的带(ever )since, for的状语及包括现在在内的词连用。如: now, today, this month, this year, recently, these days，many times, so far, by now, in the past/last few days/years… 等。
6. 过去完成时的被动 had been done
7. 过去将来时的被动 would be done
8. 过去进行时的被动 was/were being done
9. 带情态动词的被动语态 情态动词 + be done
10. 动词不定式的被动式 to be done (三)注意事项：
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1. 并不是所有动词都有被动语态
happen, take place, break out, belong to, cost, last
2. 短语动词、固定搭配变被动语态介词副词不省。 E.g. Time should be made full use of.
3. 双宾语：一个宾语成主语，另一主语保留不变。 E.g. Mother will buy me an iphone5. → I will be bought an iphone5 (by my mother) .
→ An iphone5 will be bought for me (by my mother) .
4. 复合宾语(含宾补) 省to动词不定式变被动还原to
使役：make sb. do sth.→Sb. be made to do sth.
感官类：see/hear sb. do sth. →Sb. be seen/heard to do sth.
e.g. Mum made me clean the floor. →I was made to clean the floor.
高三英语课前预习的知识点分析3
助动词
1)协助主要动词构成谓语动词的词叫助动词。被协助的动词称作主要动词。助动词自身没有词义，不可单独使用。例如：
He doesn′t like English. 他不喜欢英语。
(doesn′t是助动词，无词义;like是主要动词，有词义)
2) 助动词协助主要动词完成以下功用，可以用来：
a. 表示时态。例如：
He is singing. 他在唱歌。(北京安通学校提供)
He has got married. 他已结婚。
b. 表示语态。例如：
He was sent to England. 他被派往英国。
c. 构成疑问句。例如：
Do you like college life? 你喜欢大学生活吗?
Did you study English before you came here? 你来这儿之前学过英语吗?
d. 与否定副词not合用，构成否定句。例如：
I don′t like him. 我不喜欢他。
e. 加强语气。例如：
Do come to the party tomorrow evening. 明天晚上一定来参加晚会。
He did know that. 他的确知道那件事。
3) 最常用的助动词有：be, have, do, shall, will, should, would等。
3 助动词be的用法
1) be +现在分词，构成进行时态。例如：
They are having a meeting. 他们正在开会。
English is becoming more and more important. 英语现在越来越重要。(北京安通学校提供)
2) be + 过去分词，构成被动语态。例如：
The window was broken by Tom.. 窗户是汤姆打碎的。