初中英语较之小学英语，不管是词汇量还是语法都有了一个整体的提升。很多学生觉得英语语法太难，各种搭配规则和固定的使用语境，时态变化，无一不让我们的学生望而生畏。学好语法知识对于整个初中的学习来说，是极为关键的，英语能考高分的同学，不管是阅读，作文还是语法，综合水平都是比较好的。不仅如此，初中阶段如果能打好基础，以后到了高中，甚至大学的英语学习，就会变得顺利很多。
对于初中英语语法，同学们一定要分专题去总结，比如：非谓是一个专题，宾语从句一个专题，定语从句一个专题......这样分专题再来整理，形成大脑中的知识网络体系。记忆的时候，只需要记住一些特殊的用法和特殊情况，其他的套用规则就可以。
在整个初中英语语法的学习中，非谓语动词是一个重点，也是一个难点。非谓语动词是指在句子中不是谓语的动词，主要包括不定式、动名词和分词（现在分词和过去分词），即动词的非谓语形式。动词除作谓语以外，在句中还可以作主语、表语、宾语、定语、状语和补语等，这就是动词的非谓语动词。
一：非谓语动词的结构形式
动词不定式：to + 动词原形(在某些情况下可以不带to )。(没有人称和数的变化，可以有自己的宾语和状语，可以有时态和语态的变化)
1.一般式：主动语态：to do , 被动语态：to be + 动词过去分词(表示动作或状态与谓语动词的动作或状态同时发生或之后发生)
2.进行式：主动语态：to be doing
3. 完成式：主动语态：to have +动词过去分词，被动语态：to have been +动词过去分词 (表示动作或状态在谓语动作之前就发生)
非谓语动词的用法：
A. 作主语：To learn a foreign language is not easy . = It’s not easy to learn a foreign language.
B. 作表语：The most important thing is to finish the work on time.
C. 作宾语：
a. 动词+to do . 例： He decided to buy a new watch . (agree, choose, want, hope, like, wish, learn, love, plan, try, start, afford …)
b. 动词+疑问词+to do I don’t know where to put the bike .
c. 动词+形式宾语(it)+宾补+to do I find it important to learn a second foreign language .
D. 作补语：
a. 动词+宾语+to do.例：Tom asked me to show him the new shoes . (tell, wish, ask, want, like, beg, invite, allow, encourage…)
b. 动词+宾语+不带to的动词.例：He often saw Tom play football .(see, hear, feel, watch, notice, have, make, let…)
E. 作状语：
a. 表示目的.例：He went to Guangzhou to see his sons . He got up early in order to catch the first bus .
b. 表示结果.例：He is too tired to walk any farther . They aren’t old enough to go to school .
c. 表示原因.例：He is sorry to hear that . I am glad to see you .
F.作定语.例：I have something to tell you . I want to buy something to eat .
4.动词不定式to 的省略：
A. 在感官动词feel, hear, see, watch, notice 及使役动词have, let, make等后面要省to，但在变被动语态时要还原不定式to。
I often saw him go out of the room .-------- He was often seen to go out of the room by me .
B.在had better, would rather, do nothing but等后面常省to。
5. 动词不定式的否定形式：not + to do ，有时也可以用-never + to do 结构。
二. 动名词：动词原形+ing ，具有名词、动词一些特征
（1） 一般式：主动语态：doing ，被动语态：being + 动词过去分词(表示动作或状态与谓语动词的动作或状态同时发生或之后发生)
（2）完成式：主动语态：having +动词过去分词，被动语态：having been +动词过去分词(表示动作或状态在谓语动词的动作或状态之前就发生)Children enjoy watching animated cartoon . I don’t remember having ever seen the film .
（3） 动名词的否定形式：not + 动名词(v-ing) I regret not being able to help you .
（4）用法：
A. 作主语：
a. 动名词作主语如果太长，可以用形式主语it代替。Learning English is very important .--- It’s very important to learn English .
b. No + 动名词表示"禁止"。No smoking, No parking .
B. 作宾语：He finished doing his homework .
C. 作表语：His favourite sport is playing basketball .
D. 作定语：shopping basket, finishing line . (表明名词的用途、功能等)
E. 动名词的复合结构：名词所有格、形容词物主代词+动名词。Do you mind my / Wei Fang’s opening the window ?
三：现在分词
（1）一般式：主动语态：doing ，被动语态：being + 动词过去分词(表示动作或状态与谓语动词的动作或状态同时发生)
（2） 完成式：主动语态：having +动词过去分词，被动语态：having been +动词过去分词(表示动作或状态在谓语动词的动作或状
态之前就发生)
（3） 动名词的否定形式：not + 动名词(v-ing) No understanding the meaning of the words, he couldn’t explain the sentence.
（4）用法：
A. 作表语。The result is surprising .
B. 作定语。Developing country (主谓关系) sleeping boy (boy 所做的动作)
C. 作状语。Passing by the house, he saw a girl playing the piano. = when he was passing by the house , he saw a girl playing the piano.
D. 作宾补。I found him lying on the grass.
四：过去分词
1 形式：规则动词+ed，和不规则动词的过去分词。
2 过去分词的否定形式：not + 动词过去分词。
3 用法：
A. 作表语：My bike is broken . He is very worried .
B. 作定语：developed country, fallen leaves, spoken English .
C. 作状语：Asked why he was absent, he said he was ill . = When he was asked why he was absent, he said he was ill .
D. 作宾补：You had better have your shoes mended . I had my hair cut yesterday