人教版高中英语必修三课件：Unit4 主语从句

(3) 主谓一致
is When he will come _______(be) a puzzle. When they will start and where they will go are ______(be) decided so far. is When and where they will go _____(be) decided so far. is that book. What he needs____
检
I. 用适当的连接词填空，使句子意思完整。
Why 1. __________ he didn't attend the meeting yesterday wasn't quite clear. 2. __________ Which team will win the match is still unknown. Whoever comes to the party will receive a present. 3. ___________ that 4. It's reported ___________ three people were killed in the accident How 5. _____________ he solved the problem successfully interested all of us. 6. ____________ Who/what is to be sent there to solve the problem hasn't been decided.
不及物动词及短语 ④It+__________+( 连接词不固定)从句
（seem/happen/appear/matter/turn out/occur to/makes no difference等） Eg:你今天来或者明天来都没关系。 ___________________________________ It doesn't matter whether you come today or tomorrow. ____________
连接词+ 主语+谓语+其它 陈述语序 即 __________________ 【活学活用]】 When he will come ①____________ （他什么时候会来）is not known. ② Why was Lily late is not important.（改错）
Lily was
考点二： it 作形式主语
(1) It的用处：为了避免主语冗长和句子 ________, 头重脚轻 经常用it作________, 形式主语 主语从句放 在____ 句末 作真正的主语。 Eg:That he will refuse this piece of advice is impossible.（用it做形式主语改写句子） It is impossible that he will refuse this piece of advice.
(宾语) vt. (及物动词) O. ⑤It + ______+ _____+that 从句
Eg, It surprised/ amazed me that he should talk to his teacher in such a rude manner. (此处should表？)
考点三： 主从的语序
II. 下列各句中均有一处错误，请改正
。
1. What That the old man's son wanted to know was where the gold had been hidden.
That 2. Whether the 2008 Olympic Games will be held in Beijing excited the whole nation.
(2) if与whether
_______ Whether he will go to Beijing or not was not clear. Whether/ if he will go to It was not clear __________ Beijing. 句首 ，或者与 总结: 如果whether从句位于_____ or not 连用时，不能用if替换 _____ it 如果句中借用了_____ 作形式主语，引导词 if 可以用______ 替换whether。
★ 注意问题: (1)区分what和that
• What _____you said yesterday is right. • That _____she is still alive is a great news to all of us. 充当 成分，如 • 总结：what在从句中_____ 主、宾、表 ；that在从句中不充当 __________ _____成分,只 起____ ___省略。 连接 作用____ 无 意义 不可
3. Whoever Whatever leaves the room last ought to turn off the lights. 4. Whether How our spring sports meet will be held or not this week is not known yet.
过去分词 V-ed ③It+be+__________+that 从句 (said, reported, thought, expected, decided, announced, arranged, etc.). Eg:据报道，有五个人被埋在废墟中。 _____________________________________________ It was reported that five people were buried in the __________________ ruins.
(2)it 作形式主语常见的结构
形容词 • ①It+be+__________+that 从句 (obvious, true, natural, surprising, wonderful, possible, likely, certain, probable) • Eg:显然他撒谎了。 It was obvious that he told a lie. ________________________________________ • 特别注意：It is important / natural / necessary / impossible/unbelievable/incredible/strange that...句型中, 主 语从句应使用________ should 动词原形”的 虚拟 语气, 即用“(_______)+ 形式。 • Eg:我们学好英语是必要 的.____________________________________________ It was necessary that we (should) learn
Task2：主语从句的引导词：
• 从属连词 that , whether，if • 连接代词 who(ever), whom(ever), which(ever), what(ever)， whose • 连接副词 where ,when ,why ,how
议、展、评
考点一：连接词的选用
B [活学活用] ① ______we understand things has a lot to do with what we feel.【2015· 北京】 A.Where B.How C.Why D. When B we'll go camping tomorrow depends on the ②_____ weather. A.If B. Whether C. That D. Where C ③ ______we'll go camping tomorrow has kept us all excited the whole day. A. If B.Whether C.That D.Where C makes mistakes must correct them. ④______ A. What B. That C. Whoever D. Whatever
ቤተ መጻሕፍቲ ባይዱ
What he needs ____some books are
.
总结： 单数 形式。 ① 从句作主语时，谓语动词多用______ ② 如果由and连接两个或两个以上的主语从句作主语时，谓语动词用 ______ 复数 形式；由两个或多个连接词引导一个主语从句时，谓语动词用 单数 ________ 表语 ③ what 引导的主语从句，主句动词的单复数形式由________ 决定. （what 用法较特殊)
特别注意:在 It + be +suggested/advised/ordered/requested/insisted/r equired/demanded 中, that从句的谓语也应该用 should 虚拟 语气, 即用“(_______)+ _____ 动词原形”的形式。
Eg:人们建议应该采取更多措施来保护环境。 It is suggested that more measures (should) be taken _____________________________________________ to protect our environment. _______________________________
reading passage, then underline the subject clauses. • 1.What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. • 2. ...it was not clear whether the shape would last or not. • 3. What is even more important is that as the earth cooled down, water began to appear on its surface. • 4. It was not immediately obvious that water was to be fundamental to the development of life. • 5.What many scientist believe is that the continued presence of water... • 6.Why they suddenly disappeared still remains a mystery. • 7. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
导 主语
{
His job is important. What he does is important.
主语从句的定义：
在句中充当主语的从句叫做主语从句。
Subject Clauses 主语从句
思Task1: Find the sentences which are subject clause in the
English well.
名词或名词词组 ②It+be+___________+that 从句
• (no wonder, an honor, a good thing, a pity, no surprise, etc.). • Eg:他很懒.。难怪他这次考试不及格。 He is very lazy. It was no wonder that he __________________________________ failed in the exam. _______________