人教版（2019）选择性必修 第二册Unit 1 Science and Scientists Discover useful structures 课件(共16张PPT)
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| 名称 | 人教版（2019）选择性必修 第二册Unit 1 Science and Scientists Discover useful structures 课件(共16张PPT) |  | |
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| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-12-04 09:55:34 | ||
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(共16张PPT)
Discovering Useful Structures P5
Unit 1 Science and Scientists
Learning objectives
In this class, you will
identify the definition of predicative clause;
identify the form of predicative clause;
talk about scientific research project with predicative clause.
1. 表语从句的定义
1）表语的定义：
表语用来描述主语是什么，包括主语的身份，特征和状态等。表语接在系动词后面。
2）表语从句的定义：
在复合句中作表语的从句叫做表语从句。表语从句位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。
系动词的分类
1.感官类系动词（sound,look,taste,smell,feel)
2.变化类系动词(get,fall,grow,turn,go,become…)
be动词
3.状态系动词
保持类系动词（keep,remain,stay）
似乎类系动词（ seem,appear）
证明类系动词（prove,turn out)
（am,is,are,was,were)，意为“是”
常见的系动词
2. 表语从句的引导词
从属连词： that / whether (if不引导表语从句)
as if /as though
1）that 在从句中仅起连接作用，无实际意义，在句中不作任何成分，不能省略。
One theory was that bad air caused the disease.
（2）whether
whether 在句子中不充当任何成分，但具有“是否”的意义。
注意：if不能引导表语从句
The question remains whether they will be able to help us.
（3）as if/though
as if / though引导表语从句时，在句子中不充当任何成分，但有意义。译为：似乎，好像。（常置于系动词look, seem, sound, be, become 等后面）
He looks as if he were a rich man.
It sounds as if someone is knocking at the door.
注意：as if/as though引导的表语从句如果是事实，就用陈述语气，如果与事实不符，就用虚拟语气(主句一般现在时，从句就用一般过去时。主句是一般过去时，从句用过去完成时 )。
连接代词：
who/whom/whose/what/which 等引导表语从句，在从句中充当成分主语、宾语、表语、定语，且各具意义。
1. The problem is __________ could find out a cure for the disease.
2. What I have not decided is ________ I am going to visit.
3. Both my parents have given me some advice on how to save money. But the question is ________________ advice I should take.
who
where
whose/which
连接副词：
when/where/why/how引导表语从句，在从句中还充当地点、时间、原因、方式状语，本身具有词义。
What John Snow showed to the world was ______ cholera could be overcome.
The exact places Snow marked on the map were _______ all those who died had lived.
What Snow was determined to find out was ________ more than 500 people died in ten days.
how
where
why
连接词 意义 充当成分 是否可省略
从属连词 that
whether
as if/though
because
连接代词 who/whom 主语、宾语、表语或定语 不可省略
whose
what
which
连接副词 when 状语 不可省略
where
why
how
无意义
不充当成分
不可省略
是否
好像
因为
谁
谁的
什么
哪一个
什么时候
哪里
为什么
怎么样
3. 表语从句的注意事项
1）why和because引导的表语从句的区别
That’s why ：那是...的原因（强调结果）
That’s because:那是因为（强调原因）
She often comes late. That’s she has a baby to take care of.
She has a baby to take care of. That’s she often comes late .
because
why
2）当主句的主语是reason,后面的表语从句表示原因时，用 that来引导表语从句，而不用 because。
The reason why he was so late is that it was raining hard.
3） 表语从句中的虚拟语气
在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形” 表示，should可省略。常见的词有：
My suggestion is that the handle of the water pump (should) be removed.
一 “坚持” insist
二 “命令” order/ command
三 “建议” suggest/ advise/ recommend
四 “要求” request/ require/demand/ ask
that
how
whether
why
what
Thank you!
Discovering Useful Structures P5
Unit 1 Science and Scientists
Learning objectives
In this class, you will
identify the definition of predicative clause;
identify the form of predicative clause;
talk about scientific research project with predicative clause.
1. 表语从句的定义
1）表语的定义：
表语用来描述主语是什么，包括主语的身份，特征和状态等。表语接在系动词后面。
2）表语从句的定义：
在复合句中作表语的从句叫做表语从句。表语从句位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。
系动词的分类
1.感官类系动词（sound,look,taste,smell,feel)
2.变化类系动词(get,fall,grow,turn,go,become…)
be动词
3.状态系动词
保持类系动词（keep,remain,stay）
似乎类系动词（ seem,appear）
证明类系动词（prove,turn out)
（am,is,are,was,were)，意为“是”
常见的系动词
2. 表语从句的引导词
从属连词： that / whether (if不引导表语从句)
as if /as though
1）that 在从句中仅起连接作用，无实际意义，在句中不作任何成分，不能省略。
One theory was that bad air caused the disease.
（2）whether
whether 在句子中不充当任何成分，但具有“是否”的意义。
注意：if不能引导表语从句
The question remains whether they will be able to help us.
（3）as if/though
as if / though引导表语从句时，在句子中不充当任何成分，但有意义。译为：似乎，好像。（常置于系动词look, seem, sound, be, become 等后面）
He looks as if he were a rich man.
It sounds as if someone is knocking at the door.
注意：as if/as though引导的表语从句如果是事实，就用陈述语气，如果与事实不符，就用虚拟语气(主句一般现在时，从句就用一般过去时。主句是一般过去时，从句用过去完成时 )。
连接代词：
who/whom/whose/what/which 等引导表语从句，在从句中充当成分主语、宾语、表语、定语，且各具意义。
1. The problem is __________ could find out a cure for the disease.
2. What I have not decided is ________ I am going to visit.
3. Both my parents have given me some advice on how to save money. But the question is ________________ advice I should take.
who
where
whose/which
连接副词：
when/where/why/how引导表语从句，在从句中还充当地点、时间、原因、方式状语，本身具有词义。
What John Snow showed to the world was ______ cholera could be overcome.
The exact places Snow marked on the map were _______ all those who died had lived.
What Snow was determined to find out was ________ more than 500 people died in ten days.
how
where
why
连接词 意义 充当成分 是否可省略
从属连词 that
whether
as if/though
because
连接代词 who/whom 主语、宾语、表语或定语 不可省略
whose
what
which
连接副词 when 状语 不可省略
where
why
how
无意义
不充当成分
不可省略
是否
好像
因为
谁
谁的
什么
哪一个
什么时候
哪里
为什么
怎么样
3. 表语从句的注意事项
1）why和because引导的表语从句的区别
That’s why ：那是...的原因（强调结果）
That’s because:那是因为（强调原因）
She often comes late. That’s she has a baby to take care of.
She has a baby to take care of. That’s she often comes late .
because
why
2）当主句的主语是reason,后面的表语从句表示原因时，用 that来引导表语从句，而不用 because。
The reason why he was so late is that it was raining hard.
3） 表语从句中的虚拟语气
在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形” 表示，should可省略。常见的词有：
My suggestion is that the handle of the water pump (should) be removed.
一 “坚持” insist
二 “命令” order/ command
三 “建议” suggest/ advise/ recommend
四 “要求” request/ require/demand/ ask
that
how
whether
why
what
Thank you!