八年级下册英语知识点
人学习英语知识 ,必须以知识点为单位、逐个知识点地学习。下面是小编为大家精心整理的八年级下册英语知识点，仅供参考。
八年级下册英语知识点(一)
重点语法
【反身代词】英语中共有八个反身代词，在使用时应注意和它所指的相应的对象在人称、性别、数上保持一致。
数 人称
第一人称
第二人称
第三人称
单数
myself
yourself
himself herself itself
复数
ourselves
yourselves
themselves
【用法】
1. 可用作宾语，指的是宾语和主语表示同一个或同一些的人或事物。
如：Maria bought herself a scarf. We must look after ourselves very well.
2. 可用作表语，指的是表语和主语表示同一个或同一些人或事物。 如： She isn’t quite herself today.
3. 可用作主语或宾语的同位语，常用来加强语气。
如：She herself will fly to London tomorrow. I met the writer himself last week.
4. 用在某些固定短语当中。
look after oneself / take care of oneself 照顾自己 teach oneself sth./ learn sth. by oneself自学
enjoy oneself 玩得高兴，过得愉快
help oneself to sth 请自用……(随便吃/喝些……).
hurt oneself摔伤自己
say to oneself自言自语
leave sb. by oneself把某人单独留下
buy oneself sth.给自己买……东西
introduce oneself 介绍……自己
【提醒】
1. 反身代词不能单独做主语，但可以做主语的同位语，起强调作用。 如：我自己能完成作业。
(误)Myself can finish my homework. (正) I myself can finish my homework. / I can finish my homework myself.
2. 反身代词表示“某人自己”不能表示“某人的东西”，因为它没有所有格的形式。表达“某人自己的(东西)”时，须要用one’s own.
如：我用我自己的蜡笔画画。(误)I’m drawing with myself crayons. (正) I’m drawing with my own crayons.
八年级下册英语知识点(二)
基本知识点
1. sick 生病的，有病的;可在句中作表语Mary could not come because she is sick.
也可作定语a sick child
【区别ill】ill与sick同义;但是只在句中做表语，不做定语。Mary could not come because she is ill.
2. cheer (sb.) up(让某人)变得高兴;振奋起来The good news cheered up everyone in our class.
3. give out分发;散发，相当于hand out，The teacher is giving out/ handing out the test papers.
give sth. out to sb. 意为 把某物分发给某人 。
4. volunteer 【名词】志愿者 【动词】义务做，自愿做(某事)volunteer to do sth. 自愿做某事 ，
The girls could volunteer in an after-school study program.
5. used to do sth.过去/曾经(常)做某事，表示过去的习惯、动作或状态，并强调现在已经不再存在或发生。
There used to be a cinema here. 这里曾有一个照相机。
They told me stories about the past and how things used to be. 他们告诉我关于这里过去的故事。
6. alone 【形容词】独自一人的，无感情色彩：The musician enjoyed living alone and writing songs himself.
lonely (感到)孤独寂寞的，带有很强的感情色彩，可做表语或定语。The lonely boy is not lonely now.
7. care for sb./sth.照顾;照料……
care 【名词】小心，关心take care of=look after →【动词】care about sb./sth.关心，在意某人/事
→【形容词】careful 仔细的 / careless 粗心的 →【副词】carefully 仔细地
8. such “这样的，这种，如此”，用于修饰名词
such+ a/ an+形容词+单数名词：such a good day 多么美好的一天 /such an exciting match 多么 精彩的比赛
such+形容词+复数名词/不可数名词：such important decisions 多么重要的建议 such delicious food 多么美味的食物
如果名词前被many, much, few, little修饰时，只能用so，而不用such：so many sick children/ so little time
9. try out for…参加…选拔，争取成为…Thirty football players tried out for the Best Player of the year.
try out试用，试验
10. journey 【名词】(尤指长途)旅行，行程;trip【名词】多指短途旅行;
travel【名词、动词】travel around the world →【名词】traveler旅行者
11.【复习】be busy with sth. 忙于(做)什么事情 be busy doing sth. 忙于(做)什么事情
12.【复习】try doing sth. 试着去做某事 try to do sth. 尽力去做某事 try one’s best (to do sth.) 尽某人最大的努力去做某事
13.【复习】be worried about sb./ sth. = worry about sb./ sth. 担心某人、某事
14. raise money集资，筹钱;raise money for…为……筹钱
raise【动词】举起;提高;募集
15. keep【动词】keep+名词，保留(某物);keep+形容词，保持
16.【形容词】broken破损的，出毛病的;blind瞎的，失明的;deaf聋的;disabled有残疾的，丧失能力的;在句中做定语和表语。
make it possible (for sb.) to do sth.使(某人)做某事成为可能，
You helped to make it possible for me to have Lucky.
make it +形容词(+for sb.) to do sth. 使(某人)做某事成为…;
think/find it +形容词to do sth.
18. make a difference to…对……有影响;对……有作用，difference前可以用no, any, some, much等修饰，如
The rain made no difference to the game.
Hard-working makes much difference to study.
19. difficulty【可数/不可数】表示抽象意义的“困难”时为不可数;表示具体的“难题、难事”时为可数;
have difficulty (in) doing sth.= have trouble (in) doing sth. 做某事有困难
20. train【动词】训练，trained为过去分词，可做定语，意为“受过训练的”a trained dog
21. be excited about sth. 对某事感到兴奋 ，Everyone is excited about the good news.
【复习】excited意为 兴奋的，修饰人;exciting意为 令人兴奋/激动的，修饰物。
22. order【名词】命令，指示;顺序，次序【动词】订购;点(菜)follow the order。
23. change【动词】变化，改变It’s hard for a person to change his life(style). 【名词】变化;零钱
change A for B用A换成B：When you travel in China, remember to change US dollars for RMB.
repair 【动词】修理，修补; fix【动词】安装;使固定 【fix up修理=repair】
八年级下册英语知识点(三)
基础知识
1. What’ s the matter? 怎么啦?出什么事情了?
【解析】matter/ ' mætə(r)) /n.问题;事情
What’ s the matter with you?= What’s the trouble with you? = What’ s wrong with you? 你怎么了?
【注】： matter 和trouble 为名词， 其前可加the 或形容词性物主代词，wrong 是adj. 不能加the
【用法】用于询问某人有什么病或某人遇到什么麻烦、问题其后跟询问对象时， 与介词with连用。即：
What’s the matter with sb.? = What’s your trouble? = What’s up? = What happens to sb.?
— What’s the matter with you ? — I have a bad cold.
2. I had a cold.我感冒了。 have a cold=catch a cold=have the flu感冒
have a fever 发烧 have a cough咳嗽 have a stomachache胃疼，肚子疼 have a toothache牙疼 have a headache头疼
3. 身体部位+ache(疼痛)构成新的复合词
stomach+ache=stomachache head+ache=headache tooth+ache=toothache back+ache=backache后背痛
4. much too+ 形容词，意为 太...... ，too much+名词，意为 很多，大量 。
5. enough【形容、副词】足够的/地，enough放在名前后，形副后。good enough足够好，enough money=much money
6. lie down躺下， lie 躺，躺着，过去式lay;lie说谎，过去式lied
7. maybe “或许”，常用于句首，表示可能性，后加句子。Maybe you are right.
may be，是情态动词+be的结构，意为“可能，也许”，后加名词、代词或形容词。He may be angry.
sound like+名词代词和从句：It sounds like you don’t know the truth.
It sounds like a good idea. sound+形容词，“听起来，好像”，The music sounds nice.
9. need 需要，实义动词need+名词，需要某物;
need to do sth.需要做某事，主语通常是人，表示人主动的动作：You need to listen carefully during class.
need doing sth.主语通常是物，表示被动的动作：Your dirty clothes need washing.
10. get off (the bus) 下(公交车) get on 上车
11. agree 同意，赞同;
agree with sth. 同意某事 如：I agree with that idea.
agree to sb. 同意某人的意见 如：I agree to LiLei.
12. trouble问题，麻烦 ;be in trouble遇到麻烦，make trouble 制造麻烦 ，have trouble (in) doing sth. =have difficulties (in) doing sth做......有麻烦。
13. right away=right now=at once，意为 马上 。
14. advice [不可数名词]劝告，建议，向…征求意见， give sb. advice on sth.就某事给某人建议; advise [动词] advise sb. to do sth. 建议某人做某事
advise sb. doing sth.
【复习】exercise 练习、锻炼
当exercise意为“练习”时，为可数名词 即可加s
当exercise意为“锻炼”时，为不可数名词 即不加s
16. hurt 及物动词，使……疼痛，……受伤，He hurt his leg while exercising.
不及物动词，……(部位)疼。 His leg hurt badly.
clean 【动词】打扫，clean the classroom打扫教室，【形容词】 干净的 ，cleaner意为 清洁工 。
18. hit (用手或器具)打;击打 The boy hit the dog with a stone.
hit sb. on the head/ nose/ back打某人的头、鼻子、后背，on用在所打较硬的部位;
hit sb. in the face/ eye/ stomach 打某人的脸、眼睛、肚子，in用在所打较软的部位。
be used to sth./ doing sth.习惯于、适应了……、做某事，强调状态;His grandpa was used to country life.
Mary is not used to getting up early in the morning.
get/ become used to sth./ doing sth. “变得习惯，逐渐适应……”强调过程、动作：
It’s difficult for one to get used to another country’s habit.
20. 【复习】free [形容词]空闲的free time;免费的the drink is for free;自由的I want to become a free bird.
free【动词】使……解脱，得到自由：He could not free his arm.
run out用完，用尽 When his water run out, he knew that he would have to do something to save his own life.
物sth. run out. 某物用尽了。
人sb. run out of sth. 人用尽了某物。He run out of all his money last night.
22. risk (sb.) to do sth. 冒险去做某事 take a risk=take risks 冒险
23. the importance of (doing) sth.(做)某事的重要性
We students should know the importance of (learning) English.
importance n. 重要(性)， important adj.重要的，unimportant adj.不重要的
decision 【名词】决定;抉择; make a decision 做决定 ;
make a decision to do sth.= decide to do sth. 。
25. be in the control of …掌管，管理 The headmaster is in the control of this new school.
be out of control无法控制，无法管理 be under control被控制住，在控制之中
26. 【复习】mind意为 介意 ，mind doing sth. 介意做某事 ,
Would you mind my opening the window?
27. give up (doing) sth. 放弃(做)某事，give up (playing) computer games;
give up后可接名词、代词和动词ing形式，也可不接，如: Never give up easily.