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初三的英语语法知识点总结推荐

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  初三英语学习是中考前的一次冲锋,其中有很多东西要学,语法就是其中一种,学习初三英语语法有什么好方法呢?小编在这里为大家整理了初三英语语法学习方法,快来学习学习吧!

初三的英语语法知识点总结推荐 1

  名词性从句之名词性从句

  主语从句可以按其引导词的不同分为三类:

  第一类,用从属连词that 引导的主语从句,例如:

  That we shall be late is certain.

  That the driver could not control his car was obvious.

  这种结构主要是对that 从句的内容进行强调,属正式文体,连词that 不可以省略;但是在一般情况下,往往使用先行it 结构,即用it 作形式主语,而把that 从句放到后面,这时,在口语中,连词that 有时则可以省略.所以上述两句可以改为:

  It is certain that we shall be late.

  It was obvious that the driver could not control his car.

  如果整个句子是疑问形式,就只能用先行it 结构,例如:

  Is it true that he would take the risk?

  Is it possible that they will come tomorrow?

  常使用先行it 结构,用that 从句作主语的句子有下列几个句型:

  1、It + be + 形容词+ that 从句:

  It is clear that he was telling the truth.

  It’s probable that we’ll be a little late.

  2、It + be + 名词词组+ that 从句:

  It’s a pity that you can’t go with us.

  3、It + 及物动词+ 宾语+ that 从句:

  It worried her a bit that her hair was turning grey.

  It shocked me that Peter didn’t tell anybody where he was.

  4、It + be + 过去分词+ that 从句:

  It is said that he has been there many times.

  5、It + seem/happen/appear 等不及物动词+ that 从句:

  It seems that he has lost something.

  注意:

  在上述第1 和第2 两种句型中,that 从句前置与使用先行it,that 从句后置在意义上没有什么差异;但使用先行it 结构较为常见.

  在第3 种句型中,that 从句前置在语法上是可能的,但实际上并不常见,通常总是使用先行it 结构.

  第4 种句型实质上是被动结构,由于that 从句不可以位于句首作被动句的主语,所以只能使用先行it 结构.

  第5 种句型已经形成了固定的搭配关系,that 从句不能前置,只能使用先行it 结构,不过,这种结构可以转换为带有不定式的简单句,例如:

  It happened that I had no money with me that day.

  → I happened to have no money with me that day.

  第二类,用连接代词who、whose、which、what,连接副词when、where、how、why,以及连词whether(或if)引导的主语从句,例如:

  Who was responsible for the accident is not yet clear.

  → It is not yet clear who was responsible for the accident.

  What he did is not yet known.

  → It is not yet known what he did.

  Whether it is true remains a problem.

  → It remains a problem whether / if it is true.

  从以上例句可以看出,这类主语从句可以直接放在句首作主语,也可以使用先行it 结构,把主语从句放在后面,两种结构可以互换,意义上无差异,但用if 引导主语从句时,只能采取先行it 结构,也就是说if 不可以引导置于句首的主语从句.

  第三类,用what、whatever、where、wherever、whoever、whichever 等代词引导的主语从句,例如:

  What he said at the meeting encouraged everyone.

  Whoever fails to see this will make a big blunder.

  这类从句一般相当于带有定语从句所修饰的名词词组,即在结构上相当于一个名词加上一个定语从句,例如:

  What he wants to buy is a ten-speed bicycle.

  → The thing that he wants to buy is a ten-speed bicycle.

  Whoever breaks the law is sure to be punished.

  → Anyone who breaks the law is sure to be punished.

  切记,这类主语从句不可以使用先行it 结构.

  上述第二类主语从句与第三类主语从句尽管在形式上十分相似,但实际上是不同的.第二类结构中用连接代/副词引导的从句系由特殊疑问句转化而来,以whether/if 引导的从句系由一般疑问句转化而来,自然含有疑问的意味,例如:

  When they will have the sports meet is still a question.

  → When will they have the sports meet?

  Who he is doesn’t concern me.

  → Who is he?

  Whether he will join us won’t make too much difference.

  → Will he join us?

  而第三类结构中的主语从句则没有疑问的意味.

  试比较下列各句:

  ① What caused the accident is a complete mystery.

  ② What caused the accident was a broken bottle.

  ③ What she looks like doesn’t matter.

  ④ What she’d like is a digital watch.

  上述各句中尽管都有一个以what 引导的主语从句,但其意义不尽相同;第①和③句中的主语从句系由“What caused

  the accident?”和“What does she look like?”转化而来,所以可以改成:

  It is a complete mystery what caused the accident.

  It doesn’t matter what she looks like.

  第②④句中的主语从句含义分别为“The thing that caused the accident”和“The thing which she’d like”,所以不含疑问意味,因此不可以说:

  It was a broken bottle what caused the accident.

  It is a digital watch what she’d like.

  但是可以说:

  It was a broken bottle that caused the accident.

  It is a digital watch that she’d like.

  不过,这已不是主语从句,而是强调结构了.

初三的英语语法知识点总结推荐 2

  动名词相当于名词,在句子中可以做主语、宾语、表语、定语等。

  1. 作主语

  Fighting broke out between the South and the North.

  南方与北方开战了。

  2. 作宾语

  Would you mind turning down your radio a little, please?

  请问你介意调小一点收音机的音量吗?

  3. 作表语

  Babysister’s job is washing,cooking and taking care of the children.

  保姆的工作是洗衣服,作饭和照看孩子。

  4. 做定语

  a washing machine 一台洗衣机

初三的英语语法知识点总结推荐 3

  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 theUSA.

  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。

初三的英语语法知识点总结推荐 4

  如果我们所说的不是事实,而只是一种假设、愿望、建议或是一种实现不了的空想就用虚拟语气。

  注意:条件句分两种,真实条件句和虚拟条件句。只有在虚拟(非真实)条件句中,才用虚拟语气;而在真实条件句中,要用陈述语气。请比较:

  (1)If it is sunny tomorrow , we’ll go to the zoo.

  如果明天天气好,我们将会去公园。

  在这句话中,明天天气好是完全有可能实现的,并非虚拟、幻想,因此是真实条件句,在本句中,适用“主将从现。”

  (2)If I were you , I would go at once.

  如果我是你的话,我立刻就走。

  在这句话中,条件句“如果我是你”,但事实上,我不可能成为你,这只是假设的情况,没有实现的可能。当条件实现的可能性很小,甚至可以说没有时,就需要用虚拟语气来表示。

  虚拟语气表示和现在的事实相反,从句用一般过时,主句用 “should/would/could/ might +动词原形。

  If I had time, I would go for a walk.

  If I were invited, I would go to the dinner party.

  If I won a million dollars in the lottery, I would put it in the bank.

  If I were you , I’d wear a shirt and tie.

  注意:在虚拟语气的句子中,be动词只能用were,不能用was。

初三的英语语法知识点总结推荐 5

我用am,你用are,is连着他,她,它;

单数名词用is,复数名词全用are。

变疑问,往前提,句末问号莫丢弃。

变否定,更容易,be后not莫忘记。

疑问否定任你变,句首大写莫迟疑。

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初三英语学习是中考前的一次冲锋,其中有很多东西要学,语法就是其中一种,学习初三英语语法有什么好方法呢?小编在这里为大家整理了初三英语语法学习方法,快来学习学习吧! 1宾语从句 1. 宾语从句的含义 充当主句宾语的从句叫做宾语从句
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