高三学生很快就会面临继续学业或事业的选择。面对重要的人生选择，是否考虑清楚了?这对于没有社会经验的学生来说，无疑是个困难的想选择。如何度过这重要又紧张的一年，我们可以从提高学习效率来着手!下面小编就和大家分享英语上册高三知识点总结，来欣赏一下吧。
1. 定义：用作主语的从句叫做主语从句。
2. 构成：关联词+简单句
3. 引导主语从句的关联词有三类：
(1) 从属连词that。 如：That they were in truth sisters was clear from the facial resemblance between them.
很明显，她们确是亲姐妹，她们的脸型很相似。
(2) 从属连词whether。如：
Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。
(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever
连接副词 where, when, how, why。如：
What she did is not yet known. 她干了什么尚不清楚。
How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚。
Whoever comes is welcome. 不论谁来都欢迎。
Wherever you are is my home ---- my only home. 你所在的任何地方就是我的家----我的家。
解释：
1. 主语从句能用it作形式上的主语。常以it作形式主语的句型有：
A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。如：
It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。
It is probable that he told her everything. 很可能他把一切都告诉她了。
B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。如：
It’s a pity that we can’t go. 很遗憾我们不能去。
It’s no surprise that our team should have won the game. 我们没赢这场比赛真意外。
C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。如：
It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。
It is reported that China has sent another man-made earth satellite into orbit.
D. It+seem, happen等不及物动词及短语+that从句。如：
It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。
It happened that I was out that day. 碰巧我那天外出了。
E. It+doesn’t matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如：
It doesn’t matter whether she will come or not. 她是否来这无关紧要。
It makes no difference where we shall have the meeting. 我们在哪里开会毫无区别。
F. 当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。如：
Is it true that the scientist will give us a lecture next week? 下周那位科学家将给我们作报告是真的吗?
Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗?
G. 当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。如：
How strange it is that the children are so quiet! 孩子们这么安静真奇怪!
2.注意连接代词whoever, whatever, whichever等引导主语从句的含义
Whoever comes will be welcome. (whoever=the person who) 来的人将受到欢迎。
Whatever he did was right. (whatever=the thing that) 他所做的事情是正确的。
Whichever of you comes in will receive a prize. (whichever=anyone of you who) 你们当中不论哪个进来将会得到奖
1、 at
如： 常用词组有： at noon, at night
表示时间的 at, in, on：表示片刻的时间，at 8 o’clock，at midnight, at the end of, at that time, at the beginning of, at the age of, at Christmas, at New Year 等。
in 表示一段的时间
如：in the morning, in the afternoon, in the evening, in October, in 1998, in summer, in the past, in the future 等。
on 总是跟日子有关，on Monday, on Christmas morning, on the following, on May Day, on a warm morning 等。
2、表示时间的 since 和 from：since 表示从过去到现在的一段时间的过程，常与现在完成时连用：from 表示从时间的某一点开始，不涉及与现在的关系。一般多与现在时、过去时、将来时连用。
如：I hope to do morning exercises from today./ We have not seen each other since 1995.
3、表示时间的 in 和 after：两者都表示“在(某个时间)之后，区别在于in表示“在(一段时间)之后” ，而 after 则表示“在(某一具体时间点之后)，in 短语和将来时态连用，after 短语和过去时态或将来时态连用。
如：We’ll be back in three days.
After seven the rain began to fall.
What shall we do after graduation?
After two months he returned. 注意：after 有时也可以表示在一段时间之后(常用在过去时里)
4、表示地理位置的 in, on, to：in 表示在某范围内，on 指与什么毗邻，to 指在某环境范围之外
如：Changchun is in the northeast of China./ Mongolia is on the north of China./ Japan is tothe east of China.
5、表示“在……上”的 on 和 in：on 只表示在某物的表面上，而用 in 表示占去某物一部分，表示……上
如：There is a book on the piece of paper./ There is an interesting article in the newspaper./ He dug a hole in the wall.
6、表示“穿过……”的 through 和 across：through 表示从内部通过，与 in 有关;across 表示“穿过……”，表示从一端至另一端在表面上的通过，与 on 有关。
如：Water flows through the pipe./ The old man walked across the street.
7、in the corner, on the corner, at the corner：in the corn 表示在落，in 指角的内面;on the corner 表示“在角上” ，on 指的不是内面，也不是外面，而含内外兼有之意;at the corner指“在拐角处” 指的是拐角外附近的外面。
如：The lamp stands in the corner of the room./ I met at with him at the street corner./ He sat on the corner of the table.
8、in the end, at the end of, by the end of：in the end 作“最后”“终于”解，可单独使用，后不接介词 of;at the end of 表示“在……末梢”“到……尽头” ，既可指时间，也可以指地上或物体。不可单独使用;by the end of 作“在……结束时”“到……末为止”解，只能指时间，不可单独使用。
如：In the end they reached a place of safety./ At the end of the road stands a beautiful garden./ They decided to have an English evening at the end of this week./ by the
end of last month he had finished the novel
9、表示“关于”的 about 和 on：两者都有“关于”的意思，不过前者为一般用词，而后者表示“关于” ，为较正式的 “论述”
如：He came to tell me about something important./ He wrote a book on science
10、between, among：一般说来，between 表示两者之间，among用于三者或三者以上的中间。
如：You are to sit between your father and me./ He is always happy among his classmates.
注意：但有时说的虽然是三个以上的人或东西，如果强调的是两两相互间接关系，适用于between。
如：Agreements were made between the different countries. 在谈到一些事物或一组事物，
而把它们视为分居两边时用 between。
如：The little valley lies between high mountains.
在谈事物 间的差别时，总是用 between。
如：They don’t know the difference between wheat, coats and barley.
11、besides, except, but, except for：
besides 指除了……还有
如：All went out besides me
except 指“除了，减去什么” ，不能放在句首。
如：All went out except me.
but 与 except 意思近似，表示“除了……外”经常用在 no, all, nobody, anywhere, everything 等和其他疑 问词后面。
如：I never saw him reading anything but the newspaper.;
except for 表示“如无……就， 只是”表明理由细节。
如：His diary is good except for a few spelling mistakes.
12、表示“用”的 in 和 with：表示工具的“用” 、表示“ ，用 with，而表示材料、方式、方法、度量、单位、语言、声音等的 “用” 用 in。
如：He is writing a letter with a pen./ He wrote the letter in pencil
We measured it in pounds./ Read the text in a loud voice./ Tell me the story in English.
13、charge of 和 in the charge of：in 两者都表示 “由谁负责、照顾、管理” 区别在于： charge of 后接被照管的人或物， in the charge of 后面则跟照管的人。
如：Who is in charge of the project
The project is in the charge of an engineer
14、as, like：as 作“作为”“以……地位或身份”解。
如：Let me speak to you as a father.(事实是父亲)
like 作“象……一样”解
如：Let me speak to you like a father.(事实上不是父亲)
15、in front of 和 in the front of：in front of = before，是“在……前面”的意思(不在某物内)
in the front of 则是“在……前部”的意思(在某物内)
如：There is a desk in front of the blackboard./ The boy sat in the front of the car.
16、in, into：into 表示动向，不表示目的地或位置。
如：We walked into the park.;in 通常表示位置。
We walked in the park;
in 和 drop, fall, put, throw, break 等终止性动词连用时，也可以表示动向。
如：I have put the coin in (into) my pocket.我把硬币放进衣袋。
the most commonly used and simplest holiday greetings are, as you might expect:
1. happy new year!
2. best wishes for a happy new year.
3. may your new year start out joyful!
4. good fortune and success in the new year!
5. may the season's joy stay with you all year round!
6. may joy and happiness surround you today and always!
7. even though we're apart, you're in my heart this new year's season.
8. wishing you peace, joy and happiness throughout the coming year.
then they get more complicated:
1. may the warmest of wishes, happiest of thoughts and friendliest of greetings come to you and stay with you throughout the year.
2. wishing you a holiday season filled with joy, and all the happy things in life.
3. i was looking out the windows thinking about the person i care most about and the person that came to mind was you, so i want to wish you a happy new year.
4. another year has come to an end. and it's nice to have a friend like you to make my every day so great. thank you my dear friend.
5. when a greeting comes from afar you can't hear the wishes and can't see the smile, but you can sense the care that truly comes from the heart. happy new year.
6. everyone says the earth is such a huge place. so, with those billions and billions of people and all, i believe it's a miracle that i got to know you!
7. if i were in heaven, i'd write your name on every star for all to see just how much you mean to me.
8. remember that there is always someone thinking of you at new year, whether you get the message or not.
9. a special smile, a special face. a special someone i can't replace. a special hug, from me to you. a special friendship, i've found in you... happy new year, my dear friend.
in case you're using a mobile phone, there are short forms for certain words that can save time and put some cuteness in your message. for example, "xmas" for "christmas", "r" for "are", "u" for "you", "ny" for "new year", "c" for "see" and "4" for "four".
