九年级上册必考的英语知识点(初三英语学习不能少这一步)
九年级上册必考的英语知识点(初三英语学习不能少这一步)按那个大按钮你就能打开电脑。You can switch the computer on by pressing the big button."by doing”表示通过某种方式、方法或手段,此时by短语用作状语。如:By working hard I made great progress this term. 通过刻苦努力,我在本学期取得了巨大进步。
这个学期已经过去一半了,我把上半学期的教案都整理了一下,整理了重点难点以及语法部分,陆续会上传上来。这是九年级unit1的归纳整理,配有小视频,大家可以在我账号的合辑里找。
1、by引导的方式状语:
A: How do you study for a test?你怎样为考试而学习?
B: I study by working with a group.我通过小组合作的方式学习。
"by doing”表示通过某种方式、方法或手段,此时by短语用作状语。
如:By working hard I made great progress this term.
通过刻苦努力,我在本学期取得了巨大进步。
You can switch the computer on by pressing the big button.
按那个大按钮你就能打开电脑。
2、形式主语和形式宾语的用法和例句:
It's too hard to understand spoken English. 我理解不了英语口语。
it 在句中做形式主语
Why did Wei Fen find it difficult to learn English? 为什么韦芬发现学英语很难?
it在句中做形式宾语
动词 it 形容词 动词不定式 (动词通常有:think,make,find,feel)
He thought it hard to pass the exam.
考题:Try singing some English songs and you'll find it interesting _______ a foreign language.
A: learning B: learns C: learn D: to learn
3、“疑问词 不定式”结构
I don't know how to increase my reading speed. 我不知道如何提高我的阅读速度。
how to increase 是“疑问词 不定式”结构。疑问词what which how when where whether等与不定式连用,构成 “疑问词 不定式(短语)” 在句中常用作主语、表语或宾语。如:
How to use the computer is a question. 怎样使用这台计算机是个问题。(作主语)
The question is when to start.问题是何时出发。(作表语)
Could you tell me what to write in this letter? 你能告诉我在信里写什么吗?(作宾语) 能用这种不定式短语作宾语的动词有:tell show know learn forget 等。
例 Boys and girls attention please. Now let me tell you _________to the Bird Island.
A. how to get B. what to get C. whom to get D. where to get
4、不定式做后置定语的情况
I don't have a partner to practice English with. 我没有一个练习英语的伙伴。
动词不定式 to practice English with在句中作后置定语,修饰名词 partner。
动词不定式作后置定语时,与被修饰的名词有逻辑上的主谓或动宾关系。构成动宾
关系时若动词不定式中的动词是不及物动词或者不定式所修饰的名词或代词是不定
式动作的地点、工具等,不定式后面需有相应的介词。
We don't have enough paper_______________.
A to write B write C to write on D writing
He even didn't have a small room__________.
A. to live B. to live in C. living Dves
5. Even if you learn something well you will forget it unless you use it.即使你把某个东西学得很好,如果你不使用它,你也会忘记它。
(1) even if即使,尽管。
I will come even if it rains.即使下雨我也会来。
Even if you don't like wine try a glass of this.即使你不喜欢喝酒,也不妨尝尝这一杯。
(2) unless表示“除非,如果不” 引导条件状语从句,相当于if...not...
The child never cry unless hungry. 这小孩从来不哭,除非饿了。
I won't write unless he writes first. 除非他先写信,否则我不会写的。
考题:You won't feel happy at school _________ you get on well with your classmates.
A. though B when C unless D because
6、重点、难点全解:一般过去时与现在完成时的区别
一般过去时表示过去某个时间发生的事、存在的状态或经常发生的动作。说话的侧重点只在于陈述一件过去的事情,不强调对“现在”产生的影响。
如: He visited Guilin in1998. 他1998年参观过桂林。
时间状语有 three days ago yesterday the day before yesterday
last week (year night month) in 1989 just now at the age of 5 one day once upon a time等。
现在完成时表示动作发生在过去,对现在造成的影响或产生的结果。不与确定的过去时间状语连用。如:
Jill has bought a new computer吉尔买了一台新电脑。(着重点是现在有了一台新电脑)
时间状语有 recently lately since… for… in the past few years等。
有些时间状语,如: this morning tonight this month this year等,既能用于现在完成时,又能用于一般过去时,但在意义上有差别。
如:
I've written two letters this morning. 今天上午我写了两封信。(说话时仍是上午)
I wrote two letters this morning. 今天上午我写了两封信。(说话时已是下午或晚上)
易错易混淆知识点7:
because since as 与for 的区别
(1) because:表示直接的原因或理由,在回答why问题 时,一定要用 because。它的语气最强,表示产生那种结果的 必然的因果关系。它引导的从句一般放在主句后面,放在主句前面时,往往有强调的意味。
Jenny didn't want him to do that because her parents were very strict with her. 詹妮不想让他那么做,因为她父母对她要求很严格。
Why didn't you go to the Great Wall yesterday? 为什么昨天你没去长城?
——Because I have been there twice. 因为我去过两次了。
(2)since:表示已为人所知的、无须加以说明的原因,语气比 because 弱。一般把它译为“由于,既然”。它引导的从句的位置可置于主句前或主句后,但放在前面的情况较多。如:
Since a lot of people make mistakes in life Mr. Smith wanted to give John a chance.因为许多人一生都会犯一些错误,所以史密斯先生想给约翰一个机会。
Since you are busy I won't trouble you.
既然你很忙,我就不打扰了。
Since every is here let's begin.
(3)as:表示双方已知的事实或十分明显的原因。它只说明一般的因果关系,在语气上不如 because重。一般可译 成“因为,由于”。它引导的从句位置可置于主句前或主句后,但放在前面的情况较多。
As he didn't know much English he got out his dictionary and looked up the word "cough".由于英语懂得不多,于是他 拿出词典来查“咳嗽”这个词。
As it was raining hard they stayed at home. 因为雨下得很大,他们就待在家里。
(4)for:与 because since as不同,for是一个并列连词。 for连接的不是原因状语从句,而是与它前面的分句并列的一个分句。它表示原因的语气最弱,只是表示推理或作解释,实际上只表示一种理由。翻译时可译为“因为,其理由是”。for引导的并列句不能放在句首,只能放于句尾。
I asked him to come here for I had something to tell him 我请他到这里,因为我有事要告诉他。
The days are short for it is December now.
白天短了,因为现在是十二月。
[注意]汉语有时“因为……所以”同时出现在一个句子中,但在英语里,句中出现了表示“因为”意义的连词because since或as时,便不能再出现so。反之,如果句中出现了连词so 便不能再出现连词 because since或as。如
Because he was sick he didn't go to see the film. 因为病了,所以他没去看那部电影。
→ He was sick so he didn't go to see the film.
知识点8:Instead与 instead of
(1) instead为副词,意思是“代替;取而代之的是” 表示前面的事情没做,而是做了后面的事。 instead一般位于句首或句尾,但不能位于祈使句的前面, instead也不能位于句中。另外, instead所在的那个句子一般是肯定形式,前面的那个句子一般是否定形式。
If you cannot go let him go instead.如果你不能去,让他替你去。
Instead we have to go there immediately.相反,我们应该马上去那里。
(2) instead of相当于介词,后面接名词或动名词,做一个并列成分,可以是名词、代词、介词短语、副词等。接动词时,应该用-ing形式。 instead of短语具有否定意义,其后是没有做的事情。如:
I have to finish my work instead of going out.
我必须完成工作,不能外出
They go there on foot instead of by bus.他们没有乘公车去,而是步行去的。
●本单元重点语法:两种时态的区分
(1)一般过去时的谓语动词用过去式,而现在完成时的 谓语基本构成是“助动词have/has 过去分词”。
(2)一般过去时通常与表示过去的时间状语连用,而现在完成时则常与表示一段时间的状语连用。
看看以下几组句子有什么区别?
Have you seen the film?
Did you see the film? 你看过这部电影吗?前句强调的是被问者对剧情是否了解;后句强调的是看这部电影的动作是否发生过,并不强调是否知道其内容。
How has he done it?
How did he do it? 他是怎么做的这件事?前句强调的是他做这件事的方式对现在产生了某种影响;句单纯地询问做这件事的方式。
He has lived in Beijing for 8 years.
He lived in Beijing for 8 years. 他在北京住了8年。
前句讲的是到目前为止他在北京住了8年,可能还会继续在北京住下去。后句讲的是他在北京住过8年,现在不在北京了。
He has lived in Beijing for 8 years.
My brother left school in 2005 and since then he ________ Bei Jing
A lives B lived C will live D has lived
解析考查现在完成时态的用法。 Since是现在完成时的标志,其结构为“have/has 过去分词”。答案D
unit1总结:
单词: textbook conversation aloud pronunciation sentence patient expression discover secret grammar repeat note physics chemistry pronounce increase speed partner born ability create brain active attention connect review knowledge wisely
短语:fall in love with、 be born with、 pay attention to 、connect… with、 take notes、worry about、 over and over again、give a report
核心句型:
How do you study for a test?
I study by working with a group
It's too hard to understand the spoken English
Why did Wei Fen find it difficult to learn English?
What about listening to tapes
Have you ever studied with a group?
That sounds difficult!
Well be patient. It takes time
以上就是九年级unit1的单元重点归纳,我也把它录成小视频,大家可以在我的合辑视频里面找到,希望对同学们有用。
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