subject clause 主语从句课件.pptVIP

Subject Clause; 主语从句位于句首What we need is time.  主语从句位于句尾，使用先行词it作形式主语。 It is certain that he will win the match. ;;1）that连接词that本身没有意义，不作句子成分，只表示从句的开始，位于句首时，that不能省略； That he finished writing the composition in such a short time surprised us all. That the boy didnt take medicine made his mother angry. 学生不想完成作业让老师很烦恼（bother sb）。 That students don’t finish their work bother the teacher.;2). whether whether 不充当句子成分，表“是否”  Whether well go camping tomorrow depends on the weather.? Whether he will accept our invitation remains unknown. 雇员是否有工作经验是老板很关注的问题。 Whether the employees have working experience is what the employer care much about.;3）what, who, which, whose, when, where, why, how在从句中分别起代词、副词或形容词的作用??作主语、宾语、表语、状语和定语。;4) whatever, whoever, whomever, whichever;2. 用it 作形式主语的结构;(1) It is ＋名词＋从句 　　It is a fact that … 事实是… 　　It is an honor that …非常荣幸 　　It is common knowledge that …是常识 It is a truth that the sun rises from east. It is a pity that you didn’t go to see the film. 　　　　　　 ;(2) it is ＋形容词＋从句 　　It is natural that… 很自然… 　　It is strange that… 奇怪的是… It is strange that the man should stick to his silly ideas. It is important that we all should attend the meeting. 显然，他会成功。 It is obvious that he will succeed.;(3) it is＋过去分词＋从句 　　It is reported that… 据报道… 　　It has been proved that… 已证实… It is said that the headmaster will visit our school next week. It is suggested that the work should be done with great care. 报道说车祸中无人伤亡。 It is reported that there were no injuries and deaths.;Exercise ;;;;