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Section ll Discovering useful structures
语法精讲·
技能培养
/学语法·悟规律·迁移运用
主语从句
思维导图
网
用法力名词性从句的一种.在复合句中作主语
that/whether
what/who/which
引导词
when/where/how/why
答
wh-+ever
作形式主语的主语从句
陈述语序
语序和时态
根据具体语境来确定
要点诠释
网
一、主语从句的定义
在主从复合句中充当主语的从句即为主语从句。
What impressed me most was that they had all suffered a lot.
让我印象最深刻的是他们都受过很多苦。
It worried the mother that her son was always playing computer games.
儿子总玩电脑游戏,这位母亲对此很担心。
二、主语从句的引导词
L.连接词that和whether/if
(I)hat在从句中不充当任何句子成分,本身无任何意义,只起连接作用,但不可省略。
That we should develop a healthy lifestyle is crucial.
我们应该养成健康的生活方式,这很重要。
(2 whether/if在从句中不充当任何句子成分,起连接作用,意为“是否”,不可省略。
Whether the plan will be carried out is still unknown
-It is still unknown whether the plan will be carried out.
这个计划是否会实施还不知道。
[名师指津]whether引导主语从句时,既可直接位于句首,也可以位于句末;f引导主
语从句时只能用于t作形式主语的从句中。
[即时演练1一补全句子
D That she could come to help us made us very happy
她能来帮助我们使我们很高兴。
2 Whether she comes or not doesn't matter too much
她来不来都关系不大。
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2.连接代词(who,whom,whose,what,which,whatever,whichever,.whoever,whomever等)
连接代词引导主语从句,在从句中可以作主语、宾语、表语或定语。
Who will win the first is difficult to guess,because the two players are equal with each other.
谁会赢得比赛很难猜测,因为两位选手平分秋色。
Whoever shows great interest in cycling is qualified to participate in the competition.
无论谁对骑行感兴趣都有资格参加比赛。
Whatever you do in your spare time should do no harm to others.
你在业余时间做的任何事情都不应该伤害其他人。
[名师指津]who引导的主语从句表示一件“事情”,而whoever引导的主语从句指
“人”。
3.连接副词(when,where,why,how等)
连接副词引导主语从句并在从句中作状语。
Where did you go to school?
你是在哪里上的学?
When the delayed flight will take off depends much on the weather.
延迟的航班什么时候起飞主要取决于天气状况。
How this happened is not clear to anyone
这件事是怎样发生的,谁也不清楚。
[名师指津]名词性从句引导词的确定步骤:
(1)分析句式结构,明确名词性从句在句中的功能:
(2)明确名词性从句所表达的意义:
(3)明确名词性从句中所需要的成分及意义:
(4)确定从句的连接词。
[即时演练2]一用适当的连接代词或连接副词填空
DFor example.whoever breaks the traffic rules should be punished.
2 That people cut down too many trees destroyed the balance of nature.
3 Which part