高一英语主语从句课件人教版新课标必修1.pptVIP

Subject Clauses 主语从句 * 1. 主语从句：从句在句中充当主语成分 1). That he will succeed is certain . Whether he will go there is not known . 3) How we can help the twins will be discussed at the meeting. 1．??引导主语从句的连接词有三类： (1)????连词that、 whether ?： Whether we go by train or by boat makes no difference. Whether?he’ll?come?here?isn’t?clear.?? That price will go up is certain. What?she?did?is?not?yet?known. Who will write the poem has not been decided yet. Whatever he did is right. (2)???连接代词who,?whom,?whose,?what,?which,?whoever,?whatever,?whichever等 3)????连接副词?where,?when,?how,?why等。 How?this?happened?is?not?clear?to?anyone.? When he will be back depends on the weather. How the pyramids were built is still a mystery. 主语从句后置! 为了避免主语冗长,句子头重脚轻,经常用it作形式主语,主语从句放在后面作真正的主语. 例: That we shall be late is certain. -- It’s certain that we shall be late. 1. That the earth is round is known to all. -- 2. That you missed the chance is a pity. -- It is a pity that you missed the chance. It’s known to all that the earth is round. A.??????It+be+形容词(obvious,?true,?natural,?surprising,?good,?wonderful,?funny,?possible,?likely,?certain,?probable,?etc.)+that从句。如： It?is?certain?that?she?will?do?well?in?her?exam.? ? B.??????It+be+名词词组(no?wonder,?an?honour,?a?good?thing,?a?pity,?no?surprise,?etc.)+that从句。如： It’s?a?pity?that?we?can’t?go.?? 2. 用it 作形式主语的结构 C.????????It+be+过去分词(said,?reported,?thought,?expected,?decided,?announced,?arranged,?etc.)+that从句。如： It?is?said?that?Mr.?Green?has?arrived?in?Beijing.? D.?????It+seem,?happen等不及物动词及短语+that从句。如： It?happened?that?I?was?out?that?day.? E.??????It+doesn’t?matter?(makes?no?difference,?etc.)+连接代词或连接副词引起的主语从句。如： It?doesn’t?matter?whether?she?will?come?or?not.? 注 意： What you left are only several old books. What you said is of great importance. Whether?he’ll?come?here?is not?clear.? 1.“if” 不能引导主语从句，应有“whether”引导。 3.主语从句的 “that” 一般不能省。 4.“what”引导主语从句时，谓语动词： 1）常与其后的名词作表语一致 2）根据句子的语境而定。 4. 主语从句需注意的问题