句子结构及各类从句详解
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Topic1:whether to attend college at home or abroadTopic2:what do you think young leaders?Topic3:describe a person that impressed you most句子成分:定义:组成句子的各个部分叫做句子成分。
句子成分包括主语、谓语、宾语(直接和间接)、补语、表语、定语和状语。
一、主语1.定义:主语是句子所要说明的人或事物,是句子的主体。
一般由名词、代词、不定式或相当于名词的词或短语来充当,位于句首。
The desk is old. (名词作主语)He is a doctor. (代词作主语)To see is to believe. (不定式作主语)The secret of success is to start from scratch and keep onscratching . 不断磨练(名词短语做主语)二、谓语谓语是用来说明主语“干什么”或“怎么样”的。
谓语或谓语部分里的主要词必须用动词。
运用中,谓语和主语在人称和数上应保持一致,且谓语应在主语后面。
I play basketball in the morning. (实意动词作谓语)We can speak English . (情态动词和实意动词作谓语)三、宾语表示及物动词的动作对象或内容,通常位于动词之后或介词后构成介词短语。
一般由名词、代词、不定式或相当于名词的词或短语来充当。
Pass me the book, please. (代词和名词作间接引语和直接引语)I want to eat two hamburgers now. (不定式作宾语)She likes skipping .跳绳(动名词作宾语)四、表语表语是用来说明主语的身份、特征、性质或状态的词。
常位于系动词之后,由名词、形容词、副词、介词短语或不定式来充当。
It is a flower. (名词作表语)We are at work . (介词短语做表语)She is nice . (形容词做表语)Her job is to look after her baby. (不定式作表语)五、定语用来修饰名词或代词。
定语的位置很灵活,凡是有名词、代词的地方都可以有定语。
通常名词、形容词、数词、分词、不定式、介词短语或定语从句都可以用作定语。
The boy pupil is in class three. ((名词作定语)The girl in red is my sister. (介词短语作定语)六、状语用来修饰动词、形容词或副词的句子成分。
状语表示动作、行为发生的时间、原因。
地点、方式、目的或程度等。
一般由副词、不定式、介词短语或相当于副词的词或短语来充当。
状语通常位于句末,但有时也可以放在句首和句中。
I can jump high. (副词做状语)Without the idea, I can’t finish the work. (介词短语做状语)七、补语补语是用来对句子中的某些成分(主语、表语、宾语等)进行补充说明。
补语的形式由动词的类别来决定。
Tom was made monitor. (主语补语)I made Tom monitor. (宾语补语)I am sure to succeed.***通常情况下,主语和宾语前的成分是定语,谓语前的成分是状语,时间词做状语放在句子后面。
如下:(定语)主语(状语)谓语(定语)宾语(状语)(The tall)boy (often)goes (to the big)zoo (on Sunday).句子分类简单句、并列句、复合句简单句基本句型:S+Vi. (主语+不及物动词)S+Vi+S.C (主语+不及物动词+主语补足语)S+Vt+O. (主语+及物动词+宾语)S+Vt + I.O+D.O (主语+及物动词+间接宾语+直接宾语)S+Vt +O+O.C (主语+及物动词+宾语+宾语补足语)1、主语+不及物动词不及物动词本身就可以表达完整的意思,不需要宾语及补语,但有时可有副词,介词短语等状语修饰语,这些动词常有:appear,apologize,arrive,come,die等It happened.Things change .The operation progressed smoothly.2.主语+不及物动词+主语补足语这里的不及物动词就是指系动词,系动词本身不能表达完整的意思,需要形容词、名词、介词短语等来补充说明主语,也叫主语补足语。
根据句子的含意,系动词可分为1)表示转变或结果的,有get,become,turn,come,够等,2)表示状态的,有be动词,look,seem,sound,smell等It’s getting colder and colder.The soup has gone bad.My sister is a writer.He looks sad.3.主语+及物动词+宾语这种句型中的动词是指及物动词,或是可以后接宾语的动词短语。
同时,动词后面必须接上宾语意思才完整。
句子中的宾语成分通常是名词、代词、动词不定式、动名词或从句等。
My mom will fix everything. (everything 不能省略,省略句子意思不完整)I prefer to watch movie.4.主语+及物动词+间接宾语+直接宾语有些及物动词需要双宾语才能表达一个完整意思,这样的及物动词称之为授予动词,其后接两个宾语,也就是直接和间接宾语I sent a gift to Susan.My friend wrote a long letter to me .I will provide a new position for you.5.主语+及物动词+宾语+宾语补足语这种句型中的“宾语+宾语补足语”统称为“复合宾语”。
担任补足语的常常是名词、形容词、副词、分词、动词不定式、介词短语等I found the movie interesting. (形容词interesting做补语)My father named the dog Harley. (专有名词Harley做补语)三大从句类型:名词性从句、定语从句、状语从句一、名词性从句定义:在句子中起名词作用的句子叫名词性从句。
其功能相当于名词词组,它在复合句中可担任主语、宾语、表语、同位语、介词宾语等。
根据在句中不同的语法功能,名词性从句又可分为主语从句、宾语从句、表语从句和同位语从句。
1.主语从句定义:在复合句中用作主语的从句叫主语从句。
主语从句通常由连词that和whether,连接代词或连接副词以及关系代词what来引导1)That 引导:e.g That he is still alive is sheer luck.2)Whether 引导:Whether the plan is feasible remains to be proved.3)关系代词what引导:What he wants to tell us is not clear.4)连接代词引导:Whatever I do is wrong.Whichever you want is available.5)连接副词引导:How we find it is unknown.Why he leaves here was a secret.补充:有些时候为了保持句子平衡,主语从句常用it作形式主语,大部分主语从句都可以用it作形式主语,将主语从句后置。
可分为以下几种情况:1)对于用连词that引导的主语从句,通常可以用形式主语it代替主语从句It's necessary that you take an umbrella.2)对于关系代词what引导的主语从句,通常直接把主语放在句首,有时也可用形式主语it.It is obvious what we must do.3)对于用连接代词或副词引导的主语从句,可以用形式主语it代替主语从句,也可直接在句首用主语从句Whether he would accept this was a question.=It’s a question that whether he would accept this.4)固定搭配:It be + 名词+ that从句:It is a fact that .........、It is a surprise that........It be + 形容词+ that 从句:It is important that.......、It is necessary that .....It +不及物动词+that从句:It appears that........、It happens that...........It +be +-ed分词+that从句:It is said that.......、It is believed that............2.宾语从句定义:在句子中起宾语作用的从句,即在复合句中做主句的宾语1)由从属连词that、whether引导,只起连接主句与从句的作用,在从句中不充当句子成分。
由that引导的宾语从句中,that可省略I am not sure if/ whether I can catch up with you.Our teacher said that you are a good student.2)由连接代词who(whom、whose)、what、which等引导,连接代词有词义,除了连接作用,还在从句中充当句子成分,作主语、宾语、表语或定语等。
I want to know whose that is.I want to know what he has told you.3)由连接副词where、when、how、why等,有词义,除了起到连接作用,还在从句中做状语Do you know how to get there?3.表语从句定义:表语是一个句子,说明主语是什么或者怎么样的句子,表语由名词、形容词或相当于名词或形容词的词或短语充当,和连系动词一起构成谓语。
表语从句放在连系动词之后,充当复合句中的表语1)连系动词be、look、seem、sound、appear等引导表语从句It seems we have made a progress.2)由as if、as、though引导的表语从句It looks as if he were sleeping.3)由because、why引导That is because I practiced a lot.That’s why he came.4)使用虚拟语气的表语从句:在表示劝告、建议、命令等含意的名词后的表语从句,谓语动词用“should+动词原形”,should可省略,常见的词有plan,advice,suggestion,order,proposal等My idea is that we should do it this way.He proposal was that we should hold a meeting.4.同位语从句定义:同位语从句用于对其所修饰的名词进一步解释,说明名词的具体内容。