八年级英语下册语法知识参考经典
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八年级英语下册语法知识参考经典 1
语法是语言的主要支柱,没有任何事物是不遵循一定法则而独立存在的。
简而言之,语法为你提供了组织和表达信息所需的结构。它是传递信息的铁路,没有语法,就像火车没有铁路一样,你的思想也无法充分地表达出来。
八年级英语下册语法知识参考经典 2
一、that 从句
1、主语从句
(1)that从句作主语时,常用it作形式主语,常见的句型有:
It+be+形容词(obvious, true, natural, surprising,good,wonderful,funny,possible,likely,certain,probable,etc.)+that从句
It+be+名词词组(no wonder, an honor, a good thing, a pity, no surprise, etc.)+that从句
It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句
(2)that可以省略,但that从句位于句首时,that不能省略。
2、宾语从句
(1)常见的可以接that从句作宾语的动词有see, say, know, imagine, discover, believe, tell, show, think, consider, be sure, be afraid等。在可以接复合宾语的动词之后,如think, make, consider等,可以用it作形式宾语。
(2)That从句一般不能充当介词宾语,偶尔可作except, in 的宾语。
3、表语从句(that不可省略)
4、同位语从句
连词that引导同位语从句时,应在某些抽象名词之后,如:fact, hope, desire, thought, suggestion, idea, news, problem, possibility等,对前面的名词起补充说明的作用,that在从句中不担当任何成分,不能省略。
二、whether/if从句
1、在表语从句和同位语从句中只能用whether不能用if;当主语从句放于句首时,只能用whether不用if;当it作形式主语,主语从句放在句末时用whether或if均可;discuss后引导宾语从句时,必须用whether。
2、在宾语从句中:
(1)及物动词后:whether从句中不能有否定式,宾语从句为否定句时用if;if不能与or not连用,但可以用whether or not;whether后可以加不定式。
(2)介词后:只能用whether,不用if。
三、特殊疑问词引导的从句
1、主语从句:特殊疑问词引导主语从句时,常用it作形式主语。
2、宾语从句
(1)常见的能接特殊疑问词引导的宾语从句的动词有see, tell, ask, answer, know, decide, find out, imagine, suggest, doubt, wonder, show, discuss, understand, inform, advise等。
(2)作介词宾语。
3、同位语从句、表语从句
四、名词性关系从句
What=the thing(s) which/that, whoever=anyone who, whichever=anyone/anything that, whatever=anything that, where=the place where, when=the time when
五、名词性从句的几个难点
(一)that不可省略的情况
1、主语从句,that从句置于句首时;
2、当一个句子有两个或多个并列的宾语从句时,引导第二和以后几个从句的that不可省略;
3、由it作形式宾语时,that引导的宾语从句中,that不可以省略。
(二)wh-ever与no matter wh-的用法区别
Wh-ever既可引导名词性从句,又可引导让步状语从句;而no matter wh-只能引导让步状语从句。
(三)as if/though, because, why可以引导表语从句
注意:because引导的表语从句,主语不能是reason或cause,而且since,as不能引导表语从句。
(四)that引导的同位语从句与关系代词that引导的定语从句的区别
That引导的同位语从句成分是完整的,that在从句中不担当任何成分;that引导的定语从句成分是残缺的,that在从句中充当主语、宾语或表语。
八年级英语下册语法知识参考经典 3
1. be fond of “喜爱,爱好” 接名词、代词或动词的-ing形式。
He’s fond of swimming. 他喜欢游泳。
Are you fond of fresh vegetables. 你喜欢新鲜蔬菜吗?
He is fond of his research work. 他喜爱他的研究工作。
2. hunt for = look for寻找
I have found the book I was hunting for.我找到了那本我在找的书。
hunt for a job 找工作
3. in order to/so as to:这两个词组都可引导不定式作目的状语, in order to可放于句首, so as to则不能, 其否定形式为in order not to / so as not to.
He went to Beijing in order / so as to attend an important meeting.
In order to be noticed, he shouted and waved to us.为了让我们注意他, 他朝我们又是叫喊又是挥手。
4. care about
1) 喜欢,对...有兴趣 = care for
She doesn’t care about money.她不喜欢钱。
2)关心 = care for
She thinks only of herself. She doesn’t care about other people.她只考虑自己。她不关心别人。
3)在乎,在意(接从句或不接任何成分)
These young people care nothing about what old people might say.
这些年轻人根本不在乎老人说的话。
5. such as 意为“诸如...”,“像...”,是用来列举人或事物的。
She teaches three subjects, such as physics and chemistry.她教三门科目,像物理、化学。
6. drop a line 留下便条, 写封短信
7. make yourself at home 别客气;随便;无拘束
If you get to my house before I do, help yourself to a drink and make yourself at home.如果你在我之前到我家,自己喝点饮料,随便一点。
8. stay up 不睡;熬夜
(1) I'll be late home, don't stay up for me.
我将回家很晚,不要等我了。
(2) He stayed up reading until 2:00 in the morning.
他熬夜看书直到凌晨两点。
9. come about 引起;发生;产生
(1)How did the accident come about?
这场事故是怎么发生的?
(2) They didn't know how the change had come about.
他们不知道这个变化是怎样产生的。
10. except for 除...之外
(1) except 与 except for 的用法常有区别。except 多用于引起同类事物中被排除的一项。如:
①He answered all the questions except the last one.
除去最后一个,他回答了所有问题。
②We go there every day except Sunday.
除了星期天,我们天天去那里。
(2)except for 用于引述细节以修正句子的主要意思。如:
①Except for one old lady, the bus was empty.
除去一个老太太,这辆公共汽车全空了。
②Your picture is good except for the colours.
你的画儿很好,只是某些色彩有问题。
(3)但在现代英语中,except for也用于表示except的意思。如上述第一个例子可以是:
He answered all the questions except for the last one.
(4) 另外,在介词短语之前只能用except,不能用except for。
We go to bed before ten, except in the summer.
除了夏季,我们通常十点之前上床睡觉。
11. end up with 以...告终;以...结束
The party ended up with an English song.聚会以一首英文歌结束。
12. more or less 几乎;差不多;大约;大概;大体上
(1) I've more or less succeeded, but they haven't.
我差不多成功了,而他们没有。
(2) Our living condition has more or less improved.
我们的生活水平或多或少提高了。
13. bring in 引进;引来;吸收
(1) We should bring in new technology.
我们应该引进新技术。
(2) He brings in 800 dollars a month.
他一个月挣八百美元。
14. get away(from) 逃离
(1)The thieves got away from the shop with all our money.
小偷带着我们所有的钱从商店逃跑了。
(2)I caught a really big fish but it got away.
我钓到了一条好大的鱼,可是它逃掉了。
15. watch out (for)注意;留心
(1)Watch out! There is a car coming.
小心!汽车来了。
(2)Watch out for the hole in the road.
留神路上的那个坑。
16. see sb. off 给某人送行
Tomorrow I will see my friend off at the railway station.
明天我到火车站给朋友送行。
17. on the other hand 另一方面(用以引出相互矛盾的观点、意见等,常说on the one hand ... on the other hand一方面...另一方面)
I know this job of mine isn't well paid, but on the other hand I don't have to work long hours.
我知道这份工作报酬不高,但从另一方面来说,我也不必工作太长时间。
18. as well as 和,还
He is a talented musician as well as being a photographer.
她不但是摄影师还是个天才的音乐家。
19. take place 发生
take one’s place 入座、站好位置、取得地位
take sb’s place 或take the place of 代替、取代
20. on fire 相当于burning, 意为“燃烧;着火;起火”,有静态的含意。catch fire有动态的含意。
set…on fire/set fire to…用来表示“使...着火”、“放火烧...”。
Look, the theatre is on fire! Let’s go and help.瞧,剧院着火了,咱们去帮忙救火吧。
21. on holiday 在度假,在休假中
When I was on holiday, I visited my uncle. 我在度假的时候去看望了叔叔。
22. travel agency旅行社
=travel bureau
23. take off
1)脱下(衣服等), 解(除)掉
He took off his wet shoes.他脱下了湿鞋子。
2)(飞机)起飞
The plane took off on time. It was a smooth take-off.飞机准时起飞。起飞非常顺利。
3)匆匆离开
The six men got into the car and took off for the park.这六个人上了车,匆匆离开去公园。
24. go wrong v. 走错路, 误入岐途, (机器等)发生故障
25. in all adv. 总共
26. stay away v.外出
27. look up 查询(如宾语为代词,则代词放中间)
Look up the word in the dictionary.在字典里查单词。
相关词组:look for 寻找;look after照顾,照料; look forward to期待;look into调查; look on旁观;look out注意;look out for注意,留心,提防;look over翻阅,查看,检查;look around环视;look through翻阅,查看。
28. run after追逐,追求
If you run after two hares, you will catch neither.同时追两只兔子,你一只也抓不到。
29. on the air广播
We will be on the air in five minutes.我们五分钟以后开始广播。
This programme comes on the air at the same time every day.这个节目每天在同一时间播出。
30. think highly/well/much of对...评价很高, 赞赏, 对...印象好
He was highly thought of by the manager.经理对他非常赞赏。
I think well of your suggestion.我觉得你的建议很好。
think badly/nothing/little/lowly of...认为不好, 好...不在意, 不赞成, 觉得...不怎么样
I don’t think much of him as a teacher.我觉得他作为一个老师不怎么样。
31. leave out
1) 漏掉 You made a mistake—You’ve left out a letter “t”.你出错了—你漏掉了一个字母t.
2) 删掉, 没用 I haven’t changed or left out a thing.我没有作出变动也没有删掉任何东西。
32. stare at (由于好奇、激动等张着嘴巴,睁大眼睛地)凝视,盯着看
Don’t stare at foreigners. It’s impolite.不要盯着外国人看,这样不礼貌。
比较:glare at (to stare angrily at)怒视着
这两个小男孩互相怒视着,随时准备开战。
33. make jokes about 就...说笑
They make jokes about my old hat.他们就我的旧帽子说笑我。
have a joke with … about…跟某人开关于某事的玩笑。
He stopped to have a joke with me.他停下来跟我开玩笑。
play a joke on…开某人的玩笑
We played jokes on each other. 我们互相开玩笑。
v. joke about 取笑 They joked about my broken English.他们取笑我蹩脚的英。
34. take over 接管;接替;继承
what is good and still useful should be taken over.好的有用的东西应当继承。
Our chairman has left, so Jack will take over (his job).我们的主席走了,因此杰克将接管(他的工作)。
35. break down
1) 破坏;拆散
Chemicals in the body break our food down into useful substances.
人体中的化学元素把食物分解成有用的物质。
The peace talks are said to have broken down. (喻)据说和谈破裂了。
2)(机器)损坏 Our truck broke down outside town. 我们的卡车在城外抛锚了。
The car broke down halfway to the destination.汽车在到达目的地的中途抛锚了。
3) 失败;破裂 Their opposition broke down.他们的反对意见打消了。
4) 精神崩溃;失去控制 He broke down and wept. 他不禁失声痛哭。
5) 起化学变化 Food is broken down by chemicals. 化学物质引起食物转化。
36. get on one’s feet
1)站起来;站起来发言
2)(=stand on one's feet)自立, 经济上独立
3)(人)病好了, 可以起床了; (使)恢复, 复苏(指企业)
37. go through
1) 经历;经受;遭到
These countries have gone / been through too many wars.这些国家饱经战火。
2) 完成;做完 I didn't want to go through college.我不想上完大学。
3)通过;批准 The law has gone through Parliament. 议会已经通过了这项法案。
Their plans went through. 他们的计划得到了批准。
4)全面检查;搜查
They went through our luggage at the customs.在海关他们检查了我们的行李。
38.take over 接管;接替;继承
what is good and still useful should be taken over.好的有用的东西应当继承。
Our chairman has left, so Jack will take over (his job).我们的主席走了,因此杰克将接
管(他的工作)。
39. break down
1) 破坏;拆散
Chemicals in the body break our food down into useful substances.
人体中的化学元素把食物分解成有用的物质。
The peace talks are said to have broken down. (喻)据说和谈破裂了。
2)(机器)损坏 Our truck broke down outside town. 我们的卡车在城外抛锚了。
The car broke down halfway to the destination.汽车在到达目的地的中途抛锚了。
3) 失败;破裂 Their opposition broke down.他们的反对意见打消了。
4) 精神崩溃;失去控制 He broke down and wept. 他不禁失声痛哭。
5) 起化学变化 Food is broken down by chemicals. 化学物质引起食物转化。
八年级英语下册语法知识参考经典 4
被动语态由助动词be加及物动词的过去分词构成,助动词be有时态,人称和数的变化。被动语态的时态是由be的时态决定的,be是什么时态,全句就是什么时态,be动词后面的过去分词不变。
1. 各种时态的被动语态结构如下:
一般现在时的被动语态:主语+am / is / are (not)+过去分词
一般过去时的被动语态:主语+was / were +过去分词
现在完成时的被动语态:主语+have / has +been +过去分词
一般将来时的被动语态:主语+will +be +过去分词
过去将来时的被动语态:主语+would / should + be +过去分词
过去进行时的被动语态:主语+was / were + being +过去分词
过去完成时的被动语态:主语+had + been +过去分词
情态动词的被动语态:情态动词+be+过去分词
2. 被动语态的用法
(1)不知道或没有必要说明动作的执行者是谁,不用by+动作执行者短语。
Football is played widely all over the world.
全世界都广泛地踢足球。
(2)强调动作的承受者。
The bank was robbed yesterday afternoon.
昨天下午这家银行遭到抢劫。
(3)作客观说明时,常采用一种被动语态句型。
It is reported that about twenty children have died of flu in the USA.
据报道美国大约二十名儿童死于流感。
3. 主动语态的句子变为被动语态的步骤
(1)把原句中的宾语变为主语
(2)动词改为被动形式,即be+过去分词
(3)原来的主语,如果需要的话,放在by后面;如果没必要,可省略。
八年级英语下册语法知识参考经典 5
定冠词的用法
1.表示特定的人或物
2.表示地球、宇宙中独一无二的事物
主要指各种天体及世界上比较有影响的物体。The sun,the moon,the earth
3.表示地点、方向、时间、方式等 at the corner 在拐角处
1) 在表示季节的名词前常不用冠词。In spring 在春天
2) 具体某年的某个季节,需用冠词。In the summer of the year2008
3)用于序数词或形容词的最高级前 the first the second
4)用于形容词前使其名词化 the rich the poor
5)用于复数姓氏前,表示―夫妇‖或全家 The Smiths
6)用于乐器名词前 Play the piano
7)用于by+the+计量单位名词 By the pound
1. 用于复数名词前
复数名词泛指某类人或物时,其前通常用零冠词。Students should obey the school rules. 学生应该遵守校规。复数名词若需特指,则要加定冠词。The students are too lazy. 这些学生太懒。
2. 用于不可数名词前
不可数名词表示泛指时,其前通常用零冠词。如:Bread is made from flour. 面包是用面粉做的。
Wood is a poor conductor of sound. 木头是声音的不良导体。不可数名词若需特指,则要加定冠词。
He sawed the wood into three pieces. 他把木头锯成三块。
3.用于专有名词前
在通常情况下,专有名词前要用零冠词。如:
Mr Smith is our English teaches us English. 史密斯先生教我们英语。在特殊情况下,若专有名词需要特指,也可加定冠词。如:The Smith you‘re looking for no longer lives here.
4. 用于抽象化的可数名词前
有些可数名词抽象化后表示表示的活动,其前通常零冠词。Jim has gone to bed. 吉姆已上床睡觉了。
he goes to church every Sunday. 她每周星期天都去做礼拜。
这类主要涉及bed, church, class, college, school, university, work, hospital, prison, market, sea, town等。另外,这类名词前用不用冠词有时与英美英语的表达习惯有关。如:―住院‖在英国英语中通常说成 in hospital,而在美国英语中则通常说成in the hospital;类似的还有go to university (英)上大学 / go to the university (美)上大学;at table (英)在吃饭 / at the table (美)在吃饭。
5. 用于职务及头衔前
当表示职务及头衔的名词用作表语、补足语及同位语时,其前通常用零冠词。如:Wilson became President of the U. S. A. 威尔逊当了美国总统。He will be made captain of the football team. 他将被选为足球队队长。
6. 在表示学科、语言、三餐、月份、季节、节假日、星期等名词前,通常用零冠词。
We are all interested in physics. 我们大家都对物理感兴趣。
7. 用于某些固定结构中
go to sea 去当水手 at home 在家 at night 在晚上 at least 至少
at most 至多 at first 首先 at last 最后 in bed 在床上
on foot 步行 face to face 面对面
八年级英语下册语法知识参考经典_精选范文网




