[英语]句子成份.pptVIP

一、句子成分 （一）句子成分的定义： 构成句子的各个部分叫做句子成分。句子成分有主要成分和次要成分；主要成分有__________；次要成分有_________________________________________ （二）主语： 主语 (Subject) 是一个句子所叙述的主体，一般位于句首。但在there be结构、疑问句（当主语不疑问词时）和倒装句中，主语位于谓语、助动词或情态动词后面。主语可由名词(n)、代词(pron)、数词(num)、不定式(Inf)、动名词(v-ing)、名词化的形容词(the adj.)和主语从句(the subject clause)等表示。例如： 1.During the 1990s, American country music has become more and more popular. 2.We often speak English in class. 3.One-third of the students in this class are girls. 4.To swim in the river is a great pleasure. 5.Smoking does harm to the health. 6.The rich should help the poor. 7.When we are going to have an English test has not been decided. 8.It is necessary to master a foreign language. 1. It + be + 形容词+主语从句，如： It is uncertain whether he can come to Jenny’s birthday party or not. 2. It + be + 名词词组 + 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question等，如： It’s a pity that you missed the exciting football match. It remains a question whether he will come or not. 5. It + be + 形容词 + for sb.）+ 动词不定式 这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如： It’s necessary for the young to master two foreign language. It is unwise to give the children whatever they want. 这类形容词有：easy, difficult, hard, important, possible，wise 7. It + be +名词词组 + 动词不定式，如： It is not a good habit to stay up too late. 8. It + be + 名词或形容词 + 动名词，这类名词和形容词常常是：good, no good, no use, a waste of, useless, senseless等，如： It’s a waste of time talking to her any more. It is no use arguing about the matter with him. （三）谓语 谓语 (Predicate) 说明主语所做的动作或具有的特征和状态。动词在句中作谓语，一般放在主语之后。谓语的构成如下： 1、简单谓语：由一个动词或动词短语构成。如： He practices running every morning. The plane took off at ten o’clock. 2、复合谓语： （1）由情态动词或其他助动词加动词原形构成。如： You may keep the book for two weeks. He has caught a bad cold. （2）由系动词加表语构成。如： We are students. 注意：谓语与主语在人称与数方面要保持一致。 （四）表语 表语(Predicative)用以说明主语的性质、特征、状态与身份，它一般位于系动词（如be, become, get, look, grow, turn, see