初中英语知识点相对来说比较基础，同学们只要掌握了学习的方法，英语并没有想象中的难。下面是小编整理的初中英语必备基本知识点，供大家参考。
1.初中英语基础句型
句型一：S+Vi(主+谓)
句型二：S+L+P(主+系+表)
句型三：S+Vt+O(主+谓+宾)
句型四：S+Vt+IO+DO(主+谓+间宾+直宾)
句型五：S+Vt+O+OC(主+谓+宾+宾补)
句型六：“There+be+主语+…”(即“存在”句型)
句型七：比较句型
句型八：“it+is/was+形容词+to do/that从句”(即评价句型)
2、可数名词单数变复数类
1.规则变化:
（1）一般情况加-s,如:girls,books,pens,bags,boys,days等。
（2）以s,x,ch,sh结尾加-es,如:buses,boxes,watches,brushes等
（3）以o结尾的名词，无生命的名词多加-s，有生命的名词多加-es。如photos,zoos,potatoes,tomatoes等
（4）以辅音字母加y结尾的名词,变y为i加-es,如:cities,stories
（5）以f或fe结尾的名词变f或fe为v加-es。如:leaves,knives,shelves,wives等。
2.不规则变化的名词要熟记：
Man-men,woman-women,child-children,foot-feet，tooth-teeth,mouse-mice,people-people,sheep-sheep,Chinese-Chinese,Japanese-Japanese，deer-deer,man worker-men workers,woman doctor-women doctors
3、动词/名词变形容词类
1．在动词后加后缀-ful
如：care-careful，use-useful;
thank-thankful，help-helpful;
wonder-wonderful，forget-forgetful
2．在名词后加-y
如：luck-lucky，cloud-cloudy;
wind-windy，rain-rainy;
sun-sunny,snow-snowy
noise-noisy，health-healthy
3．在名词后加-ly
如：friend-friendly，love-lovely
4．方位名词加-ern
如：east-eastern，west-western
south-southern，north-northern
4、引导词
1.从句为陈述句，常选择引导词that，that引导宾语从句无意义，不充当句子成分常省略。例句：He told us(that)they would help us through the whole work.
2.从句为一般疑问句，常选择引导词if或whether，表示“是否”。在whether…or not结构中不能用if替换。例句：I don't know if there will be a bus any more.
3. 从句为特殊疑问句，常选择what，when，where，which，who，how等的疑问代词、副词作引导词。例句：He didn't tell me when we should meet again.
5、交际用语
1.---Excuse me, have you got …?
2.---Why don’t you …?
3.---Thanks a lot. (Thank you very much.)
4.---Have you ever done…?
5.---I’ve just done…
6.---What’s …like ?
7.---How long have you been…?
8.---Have you ever been to…?
9.---Would you like to have a try?
10.---What have you done since…?
11.---How long have you been at this …?
12.---How long has she/ he worked there…?
13.---I’m sorry he isn’t here right now.
14.---May I help you?
15.---That’s very kind of you.
