主语从句公开课.ppt
Astronomy:the science of the stars-grammar,Unit 4,Subject,Task 1:找出下列句子的主语。1.A tree has fallen across the road.2.You are a student.3.To find your way can be a problem.4.What she said is not yet known.5.That we shall be late is certain.,在复合句中充当主语的从句，叫做主语从句。,Subject Clause主语从句,Task2:找出下列句子的主语。1.That he will come is certain.2.Whether he would support us was unknown.3.What he says is not important.4.Who will take part in the meeting has not been decided.5.Which side will win is not clear.,Subject Clause主语从句,一般来说主语从句都是放在。,句首,6.Whose watch was lost is unknown.7.Why he did it remains a mystery.8.When they will start is not known yet.9.How he became a great scientist is known to us all.10.Where she has gone is not known yet.,思考：主语从句有哪些连接词？这些连接词是否充当成分？有无意义？,从属连词：连接代词：连接副词：,that、whether,what、who、which、whose,when、where、why、how,whatever、whoever、whichever,从属连词：that 引导主语从句只起引导作用，本身无 实际意义，在主语从句中不充当任何成分，但 不可 省略。,whether 引导主语从句，本身有实际意义，是否的意思，在主语从句中不充当 任何成分,连接词：how,wh-引导主语从句，本身有实际意义，在主语从句中充当句子成分。,主语从句中缺状语用连接副词:when、where、why、how,主语从句中缺主语，宾语，表语，定语用连接代词：what、who、which、whose等,Task3:用合适的连接词填空。1._ team will win the match is still unknown.2._ we need is more time.3._the earth is a solid ball is known to us all.4._the meeting will be held next week hasnt been decided yet.5._the plan will be carried out is unknown.,Which,What,That,Whether,Where,/,Whether,/,When,6._we can arrive at the airport before 8 oclock is still a question.,思考：怎样确定连接词？,Step1:找主语从句Step2:分析主语从句缺不缺成分Step3:翻译整个句子，结合意思,Whether,/,How,Task4根据下列句子中的错误，总结注意事项。1.When will he come is not known.he will总结:2.He will not come to the meeting this evening That he is true.总结:,主语从句要用陈述语序。,that 引导主语从句位于句首不可省略。,3.If the meeting will be put off has not been decided yet.Whether总结:4.When he will come are a puzzle.is When well hold the meeting and where well hold it has not been decided.have总结:,if 和 whether 均可表示“是否”，但在引导位于句首的主语从句时，只能选用whether 不能用if。,单个从句做主语，谓语动词用单数；两个或两个以上从句做主语，谓语用复数。,注意1：What he needs is that book.(be)What he needs are some books.(be)总结：,What 引导主语从句时，谓语动词be 与做表语的名词单复数一致。,注意2.That we should work hard at school is important.Its important that we should work hard at school.总结：,在主从复合句中，如果主语从句太长，为了避免句子结构头重脚轻,经常用_作形式主语,而把主语从句放在主句的谓语动词之后。,it,Ex:改写下列句子。1).That he didnt come is a pity.2).When the plane is to take off hasnt been announced.3).That we are late is obvious.,It is a pity that he didnt come.,It hasnt been announced when the plane is to take off.,It is obvious that we are late.,Ex1:单句改错。1.That is certain that we can win.2.You have made a mistake is a fact.3.Where shall we spend the holiday isnt decided.,It,we shall,That,4.Whether we will go for an outing tomorrow remain unknown.5.How caused the accident is still a mystery.,remains,What,Ex2.完成句子。1._(谁会赢得比赛)is unknown.2._(我们得不到的)seems better than what we have.3._(我在哪里过暑假)is none of your business.4.It is a pity_(你错过了班车).,Who will win the game,What we cant get,Where I spend my summer holiday,that you missed the bus,5.It is reported _(很多人把英语作为第一或第二语言)。6._(更重要的是)is that we must form a good habit of learning English.7.很显然她在说谎。_8熟能生巧是有道理的。_,that many people considerEnglish as the first or second language.,What is more important,It is obvious that she is telling lies.,That practice makes perfect is right.,DiscussionSince you entered high school,you must have met with some problems in your study or life.One can talk about the problems.The others can give some advice.Try to use the following structures:,The difficulty is.what I find difficult is.The trouble is.what worries me is.My advice is.what I would advise is.I think that.what I think is.I want to tell you that.what I want to say is.,【自我评价】1是否能正确无误地找出主语从句？能_否_ 2是否能选出正确的引导词？能 _ 否_3是否掌握了主语从句的易错点？能 _ 否_4是否能用主语从句正确交流？能 _ 否_,Homework:根据表格内容，以How to learn English well?为题写一篇短文，可以自由发挥，在短文中尽可能运用主语从句。,
