初中生善于总结英语知识点，能够大大提高学习效率，下面为大家总结了初中英语重点知识点，仅供大家参考。
复数的变换1.在后面加s。如：fathers, books, Americans, Germans, apples, bananas
2.x, sh, ch, s, tch后加es。如：boxes, glasses, dresses, watches, wishes, faxes
3.（1）以辅音字母加y结尾的变y为i再加es 如：baby-babies, family-families, duty-duties, comedy- comedies, documentary-documentaries, story-stories
（2）以元音字母加y结尾的直接加s。如：day-days, boy-boys, toy-toys, key-keys, ways
4.以o结尾加s(外来词)。如：radios, photos, 但如是辅音加o的加es：如: tomatoes西红柿, potatoes马铃薯
5.以f或fe结尾的变f为v再加es(s)。如：knife-knives, wife-wives, half-halves, shelf-shelves, leaf-leaves, yourself-yourselves
6.单复数相同(不变的)有：fish, sheep, deer鹿子, Chinese, Japanese
7.一般只有复数，没有单数的有：people,pants, shorts, shoes, glasses, gloves, clothes, socks
8.单词形式不变，既可以是单数也可以是复数的有：police警察局，警察, class班，同学, family家，家庭成员
9.合成的复数一般只加主要名词，多数为后一个单词。如：action movie-action movies, pen pal-pen pals; 但如果是由man或woman所组成的合成词的复数则同时为复数。如：man doctor-men doctors, woman teacher-women teachers.
宾语从句一、宾语从句的种类
宾语从句是一种名词性从句，在句中作及物动词的宾语，或介词的宾语，或
形容词的宾语。根据引导宾语从句的不同连词，宾语从句可分为三类。
1. 由that引导的宾语从句。That只有语法作用，没有实在的意义，在口语
和非正式文体中可以省略。例如：
He said (that) he wanted to stay at home.
I am sure (that) he will succeed.
2. 由连接代词who, whom, whose, what, which和连接副词when, where, why, how引导的宾语从句。这些连接代词和连接副词在宾语从句中充当某个成分。例如：
I don’t know why the train is late.
3. 由if或whether引导的宾语从句。If和whether在句中的意思是“是否”。例如：
I want to know if (whether) he lives there.
He asked me whether (if) I could help him.
二、宾语从句的时态
1. 如果主句的时态是一般现在时，宾语从句该用什麽时态就用什麽时态。
Can you tell me how I can get to the railway station?
2. 如果主句的时态是一般过去时，宾语从句只能用相应的过去时态(一般过去时， 过去进行时， 过去将来时，过去完成时)。例如：
He asked what time it was.
He told me that he was preparing for the sports meet.
3. 如果宾语从句所陈述的是客观真理，其时态常用一般现在时。例如：
Our teacher said that January is the first month of the year.
Scientists have proved that the earth turns around the sun.
定语从句中只能用which定语从句中只能用which，不能用that的几种情况：
1. 在介词后面的关系代词用which而不能用that。即“介词+which(代物)” 例如：
The picture for which he paid $1,000 was once owned by a duke.
他花了1000美元买下的画曾为一名公爵所拥有。
The building in which Han Mei studied was very old.
韩梅在里边学习的那幢大楼很旧。
2. 在非限定性定语从句中不能用that。例如：
Crusoe's dog, which was very old now, became ill and died.
克鲁索的狗，现在已经很老了，病死了。
3. 有两个定语从句，其中一个关系代词已有which，另一个宜用that。相反，如果其中一个为that，另一个宜用which。
Edison built up a factory which produced things that had never been seen before.
爱迪生办了一个工厂，生产过去从未见过的东西。
Let me show you the novel that I borrowed from the library which was newly open to us.
让我给你看看我从新开放的图书馆借来的小说。
“疑问词+不定式”结构1.该结构的句法功能
“wh-词+不定式”主要用作宾语：
We must think what to do. 我们必须考虑怎么办。
I can’t decide whom to invite. 我不能决定该邀请谁。
He had no idea of how to do it. 他不知道如何做此事。
除用作宾语外，还可用作主语、表语等：
When to leave has not been decided. 何时离开还没有决定。
The question is how to find him. 问题是如何找到他。
2.why用于该结构的注意点
原则上说，why 后不接不定式，不过若不定式不带 to，则可用 why：
Why not go there at once? 为什么不马上去那儿呢?
Why argue with her? 为什么要跟她争论呢?
3.how用于该结构的注意点
有些动词后接“how+不定式”作宾语时，how可省略：
Did you learn (how) to drive a car? 你学过开车吗?
但是，有些动词后面接“疑问词how+不定式”作宾语时，尽管其中的how在汉语中无需译出，但却不能将 how 省略：
He knows how to play the piano. 他会弹钢琴。
形容词和副词比较级和最高级构成结尾直加-er,-est属一般，详细构成方法逐一来侃谈。
一辅音结尾重读闭音节看，辅音双写-er,-est是习惯。
辅音加y(ly)除外有型感，按照去y,-er,-iest方法办。
上述皆属单音部分双音段，下面把多音节规律来看看。
词前加more,most此规律唤。规则变化到此已全都谈完。
有些不规则变化请你记全。“双好”better,best记的宽。
“坏病”worse,worst莫记乱。“双多”more,most不用管。
“老、远”两种形式别记篡，“有点”less,least记清盼。
