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人教版高一必修4语法
认识主语从句
南昌市第十四中学
江美
教学目标
 1.了解并掌握主语从句的相关概念
 2.重点:主语从句的句序、主谓一致。
 3.难点:引导主语从句的连接词的使
用。
主语从句的定义:
His job is important.
{ What he does is important
主语
.
在句中充当主语的从
句叫做主语从句。
• 主语从句的引导词:
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连词 that , whether
连接代词 who(ever), whom(ever),
which(ever), what(ever)
连接副词 where ,when ,why ,how
(根据从句在句子中的位置)
主语从句+谓语
主语从句的句序:
it(形主)+that(真主)
主语从句的规则:
找出下列句子中的错误,并总结规律
例1.When will he come is not known.
正:When he will come is not known.
规则一:主语从句一律用陈述语序,
即主语在前,谓语在后。
主语从句的规则:
例2. If the meeting will be put off has not been
decided yet.
正: Whether the meeting will be put off
has not been decided yet.
规则二:whether 可以引导主语从句:“是否”表不确
定的事情。放在句首,但if不能。it 作形式主语,主
语从句放句末时,whether / if 都能用。如: It is
unknown whether / if we will have lessons next weekend.
主语从句的规则:
例3. When he will come are a puzzle.
正:When he will come is a puzzle.
规则三:含主语从句的主句谓语动词多用
单数第三人称形式。
主语从句的规则:
1. What he needs is that book.
2. What he needs are some books.
规则四:what 引导的主语从句,可根据
表语决定主句动词的单复数形式。
(what 用法较特殊,需要记住。)
主语从句的规则:What 与 that 引导主语从句
(1)_____you
What
said yesterday is right.
(2) That
_____she is still alive is great news to
all of us.
规则五:what引导名词性从句时在从
句中充当句子成分,如主语,宾语,表语,
而that则不然,它在句子中只起连接作
用,但不能省略。
Consolidation ------学法指导
依据“缺什么补什么”原则确定正确的连词。所谓
“缺什么补什么”是指从句与连词之间的关系。
如果句子中缺主语,指人用who,指物用what;
如缺宾语,指人用whom,指物用what;如缺时
间状语用when;地点状语用where;原因状语用
why;方式状语用how;定语用what或which;
什么都不缺用that 。Whether表“是否” 。
做题步骤:1看谓语动词;2看从句;3分析成分;
4缺啥补啥。
What I want to say is that I’m very
glad to be here and have a nice
time with you!
Thank you!