1、主语是一个句子所叙说的主体，表示句子所说的是“什么人”或“什么事物”，一般位于句首.主语主语1.名词，名词化的形容词2 数词，代词1.单个的词2.短语1动词不定式短语2动名词和短语3名词短语3.句子句子从句1.名词Water is very important to us human beings.Dogs are useful animals.Students are proud of his success.一、单个的词The disabled need to be respected.The young should respect the old2.(名词化的形容词)Nothing i
2、s yet certain.一切都还没有肯定。All are equal before the law.We often play basketball after class.Who answers the questions?3.代词Thirteen is an unlucky number.The first is to finish the task on time.4.数词二、短语作主语1.名词短语Popular music are popular with students.Some students here study hard every day.The water here
3、 has been polluted.The car over there is made in China.2.动词不定式短语To drink a cup of cold drink in such hot weather is a great pleasure.To get up early is necessary.It is not easy to work out the problem.It is interesting to play with snow in winter.3.动名词或动名词短语做主语Swimming alone in the river is very dan
4、gerous.Smoking is harmful to your health.It is no use waiting here.=waiting here is no use.It is a waste of time sitting in front of thetelevision all day.That She won the first one was a good news.She won the first one.三、从句做主语That she did not hand in the homework on time was a bad thing.She did not
5、 hand in the homework on time.陈述句Whether they will hold a party tonighthas not been decided.Will they hold a party tonight?一般疑问句What she said is correct.What did she say?Who will write a poem has not been decided yet.Who will write a poem?特殊疑问句How this happened is not clear to anyone.How did this ha
6、ppen?When we are going to have an English testhas not been decided.When are we going to have an english test?特殊疑问句感叹句How good a student(she is)is a fact.How good a student(she is)!What hot weather(it is)is a bad situation.What hot weather(it is)!“how do you do?”is a greeting.四、句子用做主语It is certain th
7、at she will do well in her exam.It is a pity that we cant go.It is said that she won the first one.It happened that I was out that day.It doesnt matter whether she will come or not.It is a pity that you missed the chance.you missed the chance.1.It+be adj +3.It+n +4.It+2.It+be pp +从句陈述句（肯定）一般疑问句特殊疑问句感叹句Vi/phrase +
