人教版(2019)选择性必修第一册Unit 5 课件(共24张PPT)

此时if 与whether 可互换 。
➢ 2.连接代词 判断连接代词在句中充当什么成分。
What makes me angry is her attitude. S
What we need is more time. O
Which book I shall choose hasn’t been decided. 定语
If she will come or not is still a mystery. × It is still a mystery if/whether she will come. √
在引导主语从句时，位于句首或者与or not连用时，只可以
用 whether ，而不可以用
if 引导 。
If 引导主语从句时，要用 it 做形式主语，且主语从句后置，
常见类型有： （4）It +不及物动词+主语从句
seem, happen, appear, look, occur…
eg. It happened that they were out that day. 碰巧那天他们不在家。
It seems that it is going to rain. 看起来要下雨了。
realised his dream of developing seawater rice. subject
有时句子主语太长，置于句末，用it替代它放句首作形式主语。
Then find similar complex sentences from the text. 1. However, what concerned him most was that farmers often
celebrity. subject 2. That Yuan Longping had realised his dream of seawater rice
surprised the whole world. subject 3. It surprised the whole world that Yuan Longping had
由两个/多个连接词引导同一个主从，谓动使用单__数__(单数？复 数？)
三、主语从句的主谓一致
3. When the task can be finished and whether he can have a rest ____a_re___ unknown.
主语为and连接的两个主从时，谓动使用_复__数___(单数？复数？)
结论：twhhaett在he从r 在句从中句_不_中_做__不____做__成_成分分，，_无___有___意_意义义，，__不译__能为___是省__否略__。。
➢ 1.从属连词 whether vs if 翻译句子：她是否会来仍是个谜。
Whether she will come or not is still a mystery. √
真正的主语
常见类型有：
（1）It is +名词(短语)+主语从句
a pity, a fact, an honor，a good idea， a/no surprise，no wonder......
eg. It is a pity that he missed such an interesting film.
原因状语 Where will the trees be planted has not been decided.
地点状语 How they will reach the top of the high mountain is still under
方式状语 discussion.
when, why, where, how, whenever, however, wherever等在
很遗憾......
It is a good news that he has recovered. It is a fact that the more you practice, the better you get.
事实是......
常见类型有：
（2）It is +形容词+主语从句
clear, obvious, likely, probable, true…
常见类型有： （3）It is +过去分词+主语从句
said, reported, known, believed, thought, announced… eg. It is said that they are twins. 据说......
It is reported that a big earthquake hit the area.
millionaire.
2. What the school needs most__a__r_e__(be) books. 3. What he need most__i_s____(be) money. 4. When and where the meeting will be held still r_e_m__a__in_s_(remain)
a question.
四、主语从句的语序 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.
How we go for a picnic should be discussed. √
had poor harvests and sometimes even had a serious shortage of food to eat. 2. How this could be done was a challenging question at the time. 3. However, whether it was possible to develop a hybrid of selfpollinating plants such as rice was a matter of great debate. 4. What impresses people most about Yuan Longping is his ongoing ability to fulfil his dreams.
三、主语从句的主谓一致
1. Whether the patient will be taken __i_s _ (be) unknown.
从句作主语时，主句的谓语动词，大多数使用 __单__数___(单数？复数？)
2. When and where the patient will be taken __i_s__(be) unknown.
It seems / appears ... that ... 似乎……
It happened (to sb.) that ... （某人）碰巧…
It occured to sb that...
(某人)突然想起...
常见类型有： （5）It +及物动词+宾语+主语从句
eg. It shocks me that he failed in this exam. It interests me whether you succeed or not. It surprised him that they came to visit him suddenly.
4. What he wants most __is__ staying with his family. What they need ___a_r_e__ masks(口罩).
what引导主语从句时，谓动由__表__语__决定单复数 (主 语？表语？)
1. What surprised me most___i_s___(be) that the man in rags was a
Period 2
Discovering Useful Structures
Make sentences. 1. 学生惹得老师生气。 Students makes the teacher angry.
S, 单个名词 V
2. 这位学生的行为惹得老师生气。
This student’s behavior makes the teacher angry.
从句中作 状语
成分
二、主语从句太长怎么办？
That all countries work together is important.
用一个 It 来解决问题！
It is important that all countries work together.
★主语从句为了避免头重脚 轻现象,用it做__形__式__主_，语而把 从句放在后面充当_________。
S，名词短语
V
3. 这位学生不知道答案惹得老师生气。
That this student doesn’t know the answer makes the teacher angry. S，句子 复合句中用作V 主语的从句叫主语从句，属于名词性从句。
1. Look at the complex sentences below and state the functions of the noun clauses italicised. 1. What Yuan Longping really cared about was not money or
一、主语从句引导词
1.从属连词 (不作成分） 2. 连接代词 （作成分）
3. 连接副词 （作状语）
that, whether （置于句首不能用if） what, who, whom, whose, which, wh+ever
when, where, how, why
➢ 1.从属连词 That he will pass the exam is certain. 他会通过考试（这件事）是肯定的。 That the earth is round is a fact. 地球是圆的（这件事）是一个事实 Whether he will pass the exam is uncertain. 他是否能通过考试（这件事）不确定。 Whether she will win the prize is still unknown. 她是否会得奖还不知道。
eg. It was surprising that she passed the difficult exam.
It is not clear whether he told a lie. Attention：
此句型中的形容词是important, necessary，essential,strange等时， 主语从句的谓语使用虚拟语气“（should）+动词原形”。 例：It is important that we (should) learn English well.
Whoever breaks the laபைடு நூலகம் will be punished. S
指物 指人 what, who, whom, wh+ever :在从句中 做主语、宾语、表语等成分 which, whose: 在从句中 做定语 成分，译为哪一个/些 、 ...的 。
➢ 3.连接副词 判断连接副词在句中充当什么状语。 When we’ll start tomorrow will be told soon. 时间状语 Why they got involved in the fight was still unknown.
How do we go for a picnic should be discussed.
★主语从句一律用_陈__述___语__序__， 即主语在前，谓语在后。
Attention： 如果过去分词是suggested, ordered, required, advised, requested等
表示建议、要求、命令等词时，主语从句的谓语应该使用虚拟语气。 例：It is suggested that students (should) wash their clothes by themselves.