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(共20张PPT)
Period 2 Learning About Language
1. To learn about the subject clauses.
2. To use the subject clauses properly.
Learning aims
Leading-in
观察它们的共同点：
That you are coming to London is the best news I have heard this long time.
你将要来伦敦是这么久以来我听到的最好的消息。
Whether it will do us harm remains to be seen.
它是否对我们有害还要看一看。
(2021·山东卷)What he said in the speech showed an interesting opinion.
他在演讲中所说的展现了一个有趣的观点。
Whoever breaks this law deserves a fine.
触犯本法者应予以罚款。
Whichever (of you) comes in first will receive a prize.
(你们中)谁先进来谁得奖。
一、主语从句的基本用法
1．主语从句的引导词
Grammar
Subject clause
类别 例词 说明
从属连词 that, whether 两者在从句中均不作成分，只起连接作用；that无实义，whether表示“是否”。
连接代词 who, what, which, whoever, whatever等 在从句中作主语、宾语、表语、定语等成分。
连接副词 when, where, how, why等 在从句中作时间、地点、方式、原因状语等成分。
【用法归纳】
主语从句中连接词的选择技巧：
(1)根据连接词在从句中所作的语法成分。
(2)根据连接词在从句中的意义。
eg.
① _______ struck me most in the movie was the father’s deep love for his son.
② It doesn’t matter ________ you pay by cash or credit card in this store.
What
whether
【即学即练】用whether, that, whoever填空
①____________she became an artist may have been due to her father's influence.
②____________we will hold a party in the open air tomorrow depends on the weather.
③Every year,___________makes the most beautiful kite will win a prize in the Kite Festival.
④It remains to be seen __________ the newly formed committee’s policy can be put into practice.
That
Whether
whoever
whether
2．it作形式主语
【观察例句】
It's possible that he has been to Beijing.
他有可能去过北京。
It's a pity that you didn't attend the meeting.
你没参加这次会议太可惜了。
It seems that it is going to rain.
看起来好像要下雨。
It is important that he should know about this.
他应该知道此事是重要的。
It is suggested that the meeting be put off.
有人建议会议延期召开。
【用法归纳】
为保持句子平衡，常把主语从句后置，而用形式主语it代替。it作形式主语时常用于以下句型：
句型 说明
It＋系动词＋形容词＋主语从句 常用于此句型的形容词有important, (un)likely，possible, necessary, natural, wrong等。
It＋系动词＋名词＋主语从句 常用于此句型的名词有fact，idea，honour，question，pity等。
It＋系动词＋过去分词＋主语从句 常用于此句型的过去分词，有known，proved，said，decided，suggested，thought等。
It＋不及物动词＋主语从句 常用于此句型的动词有appear，happen，seem，occur，matter等。
[名师点津]
(1)在“It＋be＋过去分词＋主语从句”结构中，过去分词若为suggested/ordered/required/advised等，主语从句中的谓语用“(should)do”。
(2)在“It＋be＋形容词＋主语从句”结构中，若形容词为important/necessary/strange等，主语从句中的谓语用“(should)do”。
【即学即练】完成句子
①很可惜你不能来参加我的生日聚会。
__________________that you can't attend my birthday party.
②有人建议这位老人到乡村休息一下。
_________________that the old man should go to the countryside to have a rest.
③在我看来你好像不赞成这个计划。
________________that you disagree with the plan.
④他突然想到他把钥匙落在办公室了。
___________________________ he had left his keys in the office.
It's a pity
It's suggested
It seems to me
It suddenly occurred to him
二、主语从句中应注意的问题
1．从句要用陈述语序
How he succeeded is still a puzzle.
他是如何成功的仍然是个谜。
2．主谓一致
(1)从句作主语时，主句的谓语一般用单数形式。
Where he will get a job after graduation has puzzled him much.
毕业后到哪儿找一份工作使他很困惑。
[名师点津]　what引导主语从句时，有时主句谓语动词应与主句中作表语的名词保持一致。
What the school needs most are books.
这所学校最需要的是书。
(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；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。
When they will start and where they will go have not been decided yet.
他们将在什么时候动身以及要去哪里还没定下来。
When and where they will hold the meeting is not clear.
他们何时何地召开会议还不清楚。
【即学即练】单句语法填空
①When we will set off__________(be) still under discussion.
②When and where the meeting will be held __________(have) not been decided.
is
has
基本用法
1．主语从句的引导词（主语从句中连接词的选择技巧）
2．it作形式主语
Summary
应注意的问题
1．从句要用陈述语序
2．主谓一致
主语从句
Ⅰ.单句语法填空
1．(2021·天津高考)By the time we got to middle school it was clear _____ my older brother preferred meditation(冥想), while I was a born 　performer who preferred the theatrical, even when off stage.
2．Your support is important to our work. _________you can do helps.
3．______Li Bai, a great Chinese poet, was born is known to the public, but some won't accept it.
4．______we understand things has a lot to do with what we feel.
5．Exactly______the potato was introduced into Europe is uncertain, but it was probably around 1565.
Exercise
that
Whatever
Where
How
when
Ⅱ. 完成句子
1．有人命令操场建设下周完成。
It is ordered that the construction of the sports ground _________________________
2. (2021·新课标I卷)这段经历让人叹为观止的是那些超凡脱俗的场景。
______________________ about the experience is the out-of-this-world scenes.
3．很明显刚刚有人来拜访过他。
It is clear _________________________________.
that somebody came to visit him just now
should be completed next week.
What is so breathtaking
4．这个地区的争执(dispute)何时结束让很多人困惑。
_________________________________ puzzles many people.
5．她没有出席婚礼宴会的原因是她头痛。
_____________________________________ is that she had a headache. 　　
6. (2020·江苏卷)我们能否打赢这场战斗不是问题；这只是时间问题。
It is not a problem ___________________________; it’s just a matter of time.
7.(2023长沙雅礼中学二模)但真正让这座城市在文化上与众不同的是它的歌剧。
But __________________________, culturally, is its opera.
Why she didn't attend the wedding party
When the dispute in this area will stop
whether we can win the battle
what really sets the city apart
Do not, for one repulse, forgo the purpose that you resolved to effort.
不要只因一次挫败，就放弃你原来决心想达到的目的。

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