雅思写作必备的核心语法知识整理

　　句子构成的成分共分为九种：主语，谓语，宾语，表语，定语，状语，补语，同位语和插入语。 

　　一、主语：句子的核心主体，通常位于谓语动词之前，表明一个句子是谁或何种情况所发出执行或是承受的。在写作中常做主语的有名词、代词、主语从句、V-ing、To do五种。 

　　1名词：Computersare now being widely used in almost all fields. 

　　2代词：Weare now living in an information-explosion era. 

　　3主语从句：Whether sports stars should earn a high salaryis still discussed heatedly. 

　　4V-ing:Surfing the Internetoffers a new way for people to relax themselves. 

　　5To do:To protect the environmentis everybody’s business. 

　　二、谓语：描述或阐述主语的情况，由动词来充当，常位于主语之后。 

　　1表状态用系动词：As I see it, movie stars’earning a high salaryisunfair and unjustified. 

　　2表动作用及物或不及物动词：The Internethas revolutionizedpeople’s way of life. Tastediffers. 

　　3表拥有：人或物时用：have has无生命的东西：there be 

　　Peoplehavedifferent views on this question. 

　　There isno absolute agreement on this question. 

　　4情态动词+动词原形： 

　　In this way, teacherscan never be replacedby computers. 

　　三、宾语：及物动词或介词所指向的对象。在写作中常做宾语的有名词、宾语从句、复合结构、V-ing、To do五种。 

　　1名词作宾语：International tourism promotesthe economic development. 

　　2宾语从句作宾语：Some people holdthat air travel should be restricted. 

　　3复合结构：The advanced medical technology has madeit possible for people to live longer than ever possible before. 

　　4 V-ing: Nobody can avoidbeing influencedby media. 

　　5 To do: Some people wantto work for a big companywhile others chooseto work for a small one.