如何区分英语四大从句PPT课件
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高考英语语法完全讲解——名词性从句课件(共17张PPT)
三、what/whatever与
which/whichever的区别
what/whatever意为“什么/无论什么”，描述的事物在上下 文中没有范围；which/whichever意为“哪个/无论哪个”， 描述的事物在上下文中有范围。 To be honest, I can hardly understand what/whatever you have said. Here is the dress. This is what I have been dreaming of. Here are many beautiful dresses. You can choose whichever you like.
高考英语语法完全讲解 名词性从句
定义及分类
在句中起到名词所能充当的句子成分的从句称之 为名词性从句，名词常用来作主语、宾语、表语、 同位语，因此，对应的名词性从句可以分为四大 类：主语从句、宾语从句、表语从句、同位语从 句。
主句从句
1、作句子主语的从句叫作主语从句。 2、为避免句子头重脚轻，常用形式主语it代替主语从 句，把主语从句置于句尾。常用的句型有：It is/was+ 形容词/名词/过去分词+that从句。
表语从句
位于系动词之后作表语的从句叫表语从句。 The problem is who is to pay and when we can start.
同位语从句
同位语从句说明其前面名词的具体内容。通常由that引 导，常接同位语从句的名词有：news, conclusion, possibility, rumor, certainty, story, word, mystery, idea, doubt, hope, truth, question, belief, fact, message, evidence, information, explanation, rule, probability, question, wish, thought, statement, report, opinion, principle等。
名词性从句-完整版PPT课件精选全文
3. 连接副词：when(＝the time when什么时候，何时)，where(＝the place where什么地方，何地)，how(＝the way that/in which怎样， 以……方式，如何)，why＝the reason why为什么)。它们除起连 接作用，还在从句中作状语。
3) wh类连接词引导的主语从句： wh类连接词包括wh类的连接代词(who, whom,
whose, which, what, whoever, whomever, whichever, whatever等)和连接副词(when,
where, how, why, whenever, wherever, however 等)。what, when和wh-ever类的词有时可不表 疑问。wh类连接代词在句中既起连接作用， 又可充当主语、宾语、表语、定语等成分。 wh类连接副词在句中起连接作用，在从句中 可充当时间、地点、原因、方式状语。
【温馨提示】 ①whether/ if引导宾语从句表示“是否”
的意思时，一般情况下可互换。 ②if引导宾语从句时可以有否定式，而
whether从句则没有。 e.g. I don’t care if he doesn’t come.
5) 特殊疑问词引导的宾语从句： 由who, what, how, which, whose, where, why等词引导的宾语从句，可作动词、 介词及形容词的宾语。
【温馨提示】 doubt, doubtful与sure后名词性从句连接词 that, whether, if的选择。 ①当doubt, doubtful用于肯定句时，后面的名
词性从句的连接词常用whether或if；当 doubt, doubtful用于否定句或疑问句时，后 面名词性从句的连接词用that。
英语中的从句详细讲解ppt
英语中的从句—名词性从句
名词性从句定性
名词性从句顾名思义在句子中起到名词成为的一部分句 子。名词在句子中可以担任主、宾、表、同位语。 在一个句子中从句占据的位置不同就是不同从句，比如 占据主语的位置就是主语从句，占据了宾语就是宾语从 句。
英语中的从句—名词性从句
引导名词性从句的关联词 从属连词 that\ whether \if\as\as if（只有连接的 功能，不充当语法成分） 连接代指词who、whom、which、what、 whose和wh+ever 连接副词where、when、why、how
如何使用关系代词和关系副词 1、看句子中的谓语动词。VT（及物动词）后无宾语，就必须用关系代词，不及物动 词若缺少介词，则必须用关系副词。 e.g. This is the town where i stayed before.
This is the town at which i stayed before. This is the town which i visited before. 2、看先行词在后面的从句子中做什么成分，来选择正确的关系词。如果先行词在后 面的从句中缺少定冠词，还需在关系词前补足定冠词。 e.g. Is this the museum which you visited yesterday. Is this museum the one you visited yesterday. This is the museum where i went yesterday
The fact surprised us.
英语中的名词性从句
whether和if常用来引导宾语从句，这时两者的含义 区别很小，一般可通用,但在以下情况下if不可替代 whether。 a、whether引导的主语从句并在句首 b、引导表语从句 eg The question is whether he will love me. c、whether从句做介词宾语 eg It depends on whether he is ready d、从句后有“or not” e、在及物运动discuss后的宾语从句中，只能用 whether f、在不定式前用whether.eg I don't know whether to go
2019届二轮复习语法专题从定语从句的四种分类解说关系词 课件(73张)
一. 定语从句的基本定义
放在名词或代词后面，由关系代词或关系副词 引导的修饰该名词或代词的从句叫定语从句。 被修饰的词叫先行词。
The boy who is reading is Tom.
先行词 关系代词
Hospital is a place where a doctor works.
先行词 关系副词
③当先行词被only, just, very, right, last等 修饰时。如： This is the very book that I am looking for these days.
④当先行词被最高级修饰时。如： The TV tower is the highest building that has been built in this city. ⑤当先行词被序数词修饰时。如：
(1) that和which都可以指物，但以下5种情况 只能用that 不能用which。
①当先行词中既有人又有物时。如： Do you know the things and persons that they are talking about?
②当先行词为不定代词all, one, few, little, no, some, any, everything, nothing, nobody, none等时。如： This is all that I want from the school.
⑤whose的先行词指人时，可用of whom代替，但 语序不同，即whose+名词 = the+名词+of whom， 或= of whom + the + 名词。如： The boy whose mother (= the mother of whom或 of whom the mother) is a doctor is my friend.
放在名词或代词后面，由关系代词或关系副词 引导的修饰该名词或代词的从句叫定语从句。 被修饰的词叫先行词。
The boy who is reading is Tom.
先行词 关系代词
Hospital is a place where a doctor works.
先行词 关系副词
③当先行词被only, just, very, right, last等 修饰时。如： This is the very book that I am looking for these days.
④当先行词被最高级修饰时。如： The TV tower is the highest building that has been built in this city. ⑤当先行词被序数词修饰时。如：
(1) that和which都可以指物，但以下5种情况 只能用that 不能用which。
①当先行词中既有人又有物时。如： Do you know the things and persons that they are talking about?
②当先行词为不定代词all, one, few, little, no, some, any, everything, nothing, nobody, none等时。如： This is all that I want from the school.
⑤whose的先行词指人时，可用of whom代替，但 语序不同，即whose+名词 = the+名词+of whom， 或= of whom + the + 名词。如： The boy whose mother (= the mother of whom或 of whom the mother) is a doctor is my friend.
最新如何区分英语四大从句教学内容
adj. 的宾语
I’m sure (that)he will pass the exam.
由it 作形式宾语时，that 引导的真正宾语中， that 不可省略。
We think it highly probable that he is dead.
宾语从句
that 引导的宾语从句
一般可省
由it 作形式宾语时，that 引导 的真正宾语中， that 不可省 略。
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
what, wh- ever 引导的主语从句
翻译: 他们需要的是一本好课本. What they need is a good textbook.
无论谁干了这件工作一定要得到酬谢. Whoever did this job must be rewarded.
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
what, wh-ever 引导的主语从 句
宾语从句
?
连接词
that 引导的宾语从句： 请说出以下句子that 是否可省略
Do you know (that) he has joined the army?
whether or not I don’t care _w_h_e_t_h_er_ or not he comes. whether + to do I don’t know _w_h_e_th_e_r_ to go there.
介词后只能用whether It depends on _w__h_e_th_e_r__ you can do the work
I’m sure (that)he will pass the exam.
由it 作形式宾语时，that 引导的真正宾语中， that 不可省略。
We think it highly probable that he is dead.
宾语从句
that 引导的宾语从句
一般可省
由it 作形式宾语时，that 引导 的真正宾语中， that 不可省 略。
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
what, wh- ever 引导的主语从句
翻译: 他们需要的是一本好课本. What they need is a good textbook.
无论谁干了这件工作一定要得到酬谢. Whoever did this job must be rewarded.
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
what, wh-ever 引导的主语从 句
宾语从句
?
连接词
that 引导的宾语从句： 请说出以下句子that 是否可省略
Do you know (that) he has joined the army?
whether or not I don’t care _w_h_e_t_h_er_ or not he comes. whether + to do I don’t know _w_h_e_th_e_r_ to go there.
介词后只能用whether It depends on _w__h_e_th_e_r__ you can do the work
如何区分英语四大从句
that 引导的表语从句 whether 引导的表语从句
表语从句
特殊疑问词引导的表语从句 My question how I shall get in touch with him had not been answered.
that 引导的表语从句 whether 引导的表语从句 特殊疑问词引导的表语从句
?
是否可以省略? that 是否可以省略? 在句首时绝对不能省. that 在句首时绝对不能省. 口语中that引导真正的主语时,that可省. that引导真正的主语时,that可省 口语中that引导真正的主语时,that可省.
2. It is + 名词词组（no wonder, a good thing, a 名词词组（ pity, no surprise, ect.) + that 从句 It’s a pity (that ) we can’t go. That we can’t go is a pity.
表语从句
What, wh-ever 引导的表语从句 This is where our problem lies.
that 引导的表语从句 whether 引导的表语从句 特殊疑问词引导的表语从句
表语从句
what, wh-ever 引导的表语从 句
as if/ as though, because, why 引导的表 语从句 It looked as if it was going to rain. That was why I asked for three days’ leave. That’s because he didn’t work hard enough. 引导的表语从句, because 引导的表语从句,主语能不能是 reason 或cause? 是否可以换成since, because 是否可以换成since, as 引导 表语从句? 表语从句?
如何区分英语四大从句ppt课件
what, wh-ever 引导的同位语 从句
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Revision
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that 引导的主语从句
主语从句 whether / if引导的主语从句
特殊疑问词引导的主语从句
名 词
宾语从句 what, wh-ever 引导的主语从句
性
从 表语从句
句
同位语从句
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that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
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whether / if引导的宾语从句
宾语从句为否定句时用if I don’t care ___i_f___ he doesn’t come. whether / if…or not ( 口语中有时用 if ) I don’t care __w_h_e_t_h_er__/ _if___ he comes or not.
表语从句
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特殊疑问词引导的表语从句 My question how I shall get in touch with him had not been answered.
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表语从句
that 引导的表语从句 whether 引导的表语从句 特殊疑问词引导的表语从句
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What, wh-ever 引导的表语从句 This is where our problem lies.
There’s a feeling in me that we’ll never know what a UFO is – not ever.
? that 在同位语从句中是否做成分? that 是否能省略?
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that 引导的同位语从句
同位语从句
定语从句和状语从句的详解PPT课件
•
that I bought yesterday 从句
•
（由that引导的从句）
•
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定语从句—难点
• 关系词的用法： • that
which who whom whose when where why
17
关系词 --that
• 1. 可以指人也可以指物,先行词为人或物都可以 I like the room that we had class yesterday. She is the girl that I talked about.
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从句
• 5.定语从句: 定语用于修饰名词（名词可以充当主语，表
语，宾语）。
I like the red hat.(形容词修饰宾语) • I like the hat that I bought yesterday。
(句子做定语修饰名词hat.)
• 6.状语从句：状语表示动作发生的时间，地点，原因，方式等。叫做复合句， 复合句至少两
个谓语，即主句一个谓语，从句一个谓语。
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一个人 简单句
怀孕的妈妈 复合句
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定语从句—概念
• I like the hat that I bought yesterday。
• 1.先行词：the hat :就是被从句所修饰的那个。
宾语
宾语补足语
7
其他句子成分
• 1. 定语（形容词） 定语是用来修饰名词的。 例如： He is a tall man.（修饰表语） That beautiful girl is my sister. (修饰主语)
• I like the red hat. (修饰宾语) • I like the hat that I bought
如何区分英语四大从句
What, wh-ever 引导的表语从句 This is where our problem lies.
as if/ as though, because, why 引导的表 语从句
It looked as if it was going to rain.
That was why I asked for three days’ leave.
whether / if引导的宾语从句
宾语从句为否定句时用if I don’t care ___i_f___ he doesn’t come. whether / if…or not ( 口语中有时用 if ) I don’t care __w_h_e_t_h_er__/ _if___ he comes or not.
well.
特殊疑问词引导的宾语从句 陈述语序
I can’t imagine how he did it.
作介词宾语
We are worrying about what we should do next.
what, wh-ever 引导的宾语从句
We shall not forget when ( = the time when ) the meeting will open.
There’s a feeling in me that we’ll never know what a UFO is – not ever.
? that 在同位语从句中是否做成分? that 是否能省略?
whether 引导的同位语从句
我不知道会是否要开.
I have no idea _w_h_e_t_h_e_r_ the meeting will be given.
英语中各种从句的引导词 ppt课件
63. Twhheenla/wsthtiilme/easw+e延h续ad性g动re词at （fun表w示a一s _段w_h_时e_n间_ w）e wwehrenv/aissit+in终g 止th性e W动a词te（r P表ar示k.时间点）
1.W__h_e_re_v_e_ryou go, you should do your work well. 2.2. You should have put the bookw_h_e_re__ it had
whoever, whenever,
从 表语从句 wthhaterevewr hether
疑问词
同位语从
句句
that
whether
疑问词
1. I think that it is unnecessary for me to speak louder.
2. His mothwerhias ts,atihsfaietd引w导ith名wh词at he has done. 3. That he wa性s a从ble句to时co的me区m别ade us happy.
7. She didn’t dance so gracefully _a_s__ her sister.
8. In order _t_h_a_t we might see the sunrise, we started for the peak early.
1. Halloween is celebrated on the last night of October, __w_h_e_n__ the air is crisp and snow is not far off.
8. Controls are needed on irrigation systems _b_e_ca_u_s_e_ if the ground becomes too saturated the soil in the garden will be too muddy to allow anyone to work on it until it dries out. __If__ there is too much water constantly, the garden will become a swamp and impossible to cultivate.
1.W__h_e_re_v_e_ryou go, you should do your work well. 2.2. You should have put the bookw_h_e_re__ it had
whoever, whenever,
从 表语从句 wthhaterevewr hether
疑问词
同位语从
句句
that
whether
疑问词
1. I think that it is unnecessary for me to speak louder.
2. His mothwerhias ts,atihsfaietd引w导ith名wh词at he has done. 3. That he wa性s a从ble句to时co的me区m别ade us happy.
7. She didn’t dance so gracefully _a_s__ her sister.
8. In order _t_h_a_t we might see the sunrise, we started for the peak early.
1. Halloween is celebrated on the last night of October, __w_h_e_n__ the air is crisp and snow is not far off.
8. Controls are needed on irrigation systems _b_e_ca_u_s_e_ if the ground becomes too saturated the soil in the garden will be too muddy to allow anyone to work on it until it dries out. __If__ there is too much water constantly, the garden will become a swamp and impossible to cultivate.
中考语法知识点总结之各种从句(共24张PPT)
• （1）that指物时一般可与which互换， 但在下列情况下，要用that而不用 which。
a. 先行词有all, everything等不定代词 时，如，
Everything (that) he did is wrong.
• b. 先行词被all, every, no, some, any, little, much等修饰时，如，
I have a lot of books and three of them are in Russian.
• 3、状语从句 在复合句中起状语作用的从句叫做状
语从句。状语从句可分为时间状语、地 点状语、原因状语、目的状语、结果状 语、条件状语、行为方式状语、比较状 语、让步状语等多种。
1.时间状语从句
• 3).由as soon as (一…..就……)引导的时间状语 从句。
2.原因状语从句
• 由because 、since 、as（因为、既然、由 于）引导的原因状语从句。
• Since you have known about that , please tell us what to do .
• 如: He is the very man (that) I'm looking for.
• 只用which的情况 在介词后或在非限定性定语从句中
This is the book about which we have talked a lot.
The book, which he gave me yesterday, is very interesting.
• 3.地点状语从句 • 由wherever（无论在哪儿） 引导的地点状
语从句。
• Wherever he goes , he always brings his pet dog .
英语从句大全 Ppt
• 试比较： • I will never forget the days that/which I spent in Beijing University. (本句days 作spend 的宾语， 故用关系代词that / which ) • I have never been to Beijing, but it’s the place that I most want to visit. (place 作visit 的宾语。)
• 如： • 1）We heard the news that he had won the game. 我们听到消息他赢得了 比赛。 试比较： • 2）We heard the news that he had told her. 我们听到他对她说的消息。 （定语从句） • 例2中的that从句的作用相当于一个形 容词，其作用是修饰the news；例1中 的that从句的作用相当于一个名词， 是对the news的进一步说明。 • 有时如果主句的谓语动词较短，为保 持句子平衡，避免头重脚轻，同位语 从句也常与要说明的名词分开。例如： Word came that he died yesterday. 消息传来说他昨天死了。
英语从句专四考点归纳
从句定义
• 所谓从句是指从属于主句的句子，由从属连词 连接。由主句和从句构成的复合句，是英语中 比较复杂的句子结构。从句的种类有很多，但 根据其性质和作用可以分为：名词性从句，形 容词性从句（即定语从句），副词性从句（即 状语从句）三大类。从句构成与用法的考查要 点很多，历来是专业四级英语考试试题的热点 与焦点，专业四级英语考试几乎每年都涉及到 对名词性从句、定语从句以及状语从句的考查， 常将并列连接词、从属连词、关系代词、关系 副词放在同一题干中进行考查，故意设置干扰 项，增加试题难度，以考查考生分析交际语境、 理解句子之间的逻辑关系的能力。
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That she will do well in her exam is certain.
? that 是否可以省略?
that 在句首时绝对不能省.
口语中that引导真正的主语时,that可省.
.
3
2. It is + 名词词组（no wonder, a good thing, a pity, no surprise, ect.) + that 从句
still a problem. 当it 作形式主语，主语从句放在句末时用 whether 或if 均可。
他是否会来这还令人怀疑.
? It is doubtful __w_h_e_t_h_e_r/_i_f_ he will come
here.
.
7
主语从句
that 引导的主语从句 that 一般不能省
名词性从句
主语从句 宾语从句 表语从句
同位语从句
.
1
主语从句
?
连接词
.
2
that引导的主语从句：
1. It is + adj. (obvious, true, natural, surprising, wonderful, funny, possible, certain, ect.) + that 从句 It is certain (that) she will do well in her exam.
It is decided (that ) the meeting has been put off till next Monday.
That the meeting has been put off till next Monday is decided.
? thaቤተ መጻሕፍቲ ባይዱ 是否可以省略?
that 在句首时绝对不能省. 口语中that引导真. 正的主语时,that可省5 .
宾语从句
whether / if引导的宾语从句 特殊疑问词引导的宾语从句
.
19
what, wh-ever 引导的宾语从句
We shall not forget when ( = the time when ) the meeting will open.
She walked up to where (= the place where) he stood.
It has not been decided yet _w_h_o_ will president over the meeting.
.
9
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
.
10
what, wh- ever 引导的主语从句
翻译: 他们需要的是一本好课本. What they need is a good textbook.
.
14
宾语从句
that 引导的宾语从句
一般可省
由it 作形式宾语时，that 引导 的真正宾语中， that 不可省略。
.
15
whether / if引导的宾语从句
宾语从句为否定句时用if I don’t care ___i_f___ he doesn’t come.
whether / if…or not ( 口语中有时用 if ) I don’t care __w_h_e_t_h_er__/ _if___ he comes or not.
请说出以下句子that 是否可省略
Do you know (that) he has joined the army?
adj. 的宾语
I’m sure (that)he will pass the exam.
由it 作形式宾语时，that 引导的真正宾语中， that 不可省略。
We think it highly probable that he is dead.
well.
.
16
that 引导的宾语从句
宾语从句
whether / if引导的宾语从句
.
17
特殊疑问词引导的宾语从句 陈述语序
I can’t imagine how he did it.
作介词宾语
We are worrying about what we should do next.
.
18
that 引导的宾语从句
whether or not I don’t care _w_h_e_t_h_er_ or not he comes. whether + to do I don’t know _w_h_e_th_e_r_ to go there.
介词后只能用whether
It depends on _w__h_e_th_e_r__ you can do the work
无论谁干了这件工作一定要得到酬谢. Whoever did this job must be rewarded.
.
11
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
what, wh-ever 引导的主语从 句
.
12
宾语从句
?
连接词
.
13
that 引导的宾语从句：
It’s a pity (that ) we can’t go.
That we can’t go is a pity.
? that 是否可以省略?
that 在句首时绝对不能省.
口语中that引导真正的主语时,that可省.
.
4
3. It is + 过去分词（ said, reported, thought, expected, decided, announced, arranged, ect.) + that 从句
whether / if引导的主语从句
主语从句放于句首，只能用whether 当it 作形式主语，主语从句放在句末 时用whether 或if 均可。
.
8
特殊疑问词引导的主语从句 It makes no difference _w__h_e_re__ we shall have the meeting.
主语从句
that 引导的主语从句
that 置于句首时绝对不能省, 口语中that引导真正的主语 时,that可省.
.
6
whether / if引导的主语从句
翻译:
主语从句放于句首，只能用whether
明天是否开会仍然是个问题.
? _W__h_e_th__e_r the meeting will be given is
? that 是否可以省略?
that 在句首时绝对不能省.
口语中that引导真正的主语时,that可省.
.
3
2. It is + 名词词组（no wonder, a good thing, a pity, no surprise, ect.) + that 从句
still a problem. 当it 作形式主语，主语从句放在句末时用 whether 或if 均可。
他是否会来这还令人怀疑.
? It is doubtful __w_h_e_t_h_e_r/_i_f_ he will come
here.
.
7
主语从句
that 引导的主语从句 that 一般不能省
名词性从句
主语从句 宾语从句 表语从句
同位语从句
.
1
主语从句
?
连接词
.
2
that引导的主语从句：
1. It is + adj. (obvious, true, natural, surprising, wonderful, funny, possible, certain, ect.) + that 从句 It is certain (that) she will do well in her exam.
It is decided (that ) the meeting has been put off till next Monday.
That the meeting has been put off till next Monday is decided.
? thaቤተ መጻሕፍቲ ባይዱ 是否可以省略?
that 在句首时绝对不能省. 口语中that引导真. 正的主语时,that可省5 .
宾语从句
whether / if引导的宾语从句 特殊疑问词引导的宾语从句
.
19
what, wh-ever 引导的宾语从句
We shall not forget when ( = the time when ) the meeting will open.
She walked up to where (= the place where) he stood.
It has not been decided yet _w_h_o_ will president over the meeting.
.
9
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
.
10
what, wh- ever 引导的主语从句
翻译: 他们需要的是一本好课本. What they need is a good textbook.
.
14
宾语从句
that 引导的宾语从句
一般可省
由it 作形式宾语时，that 引导 的真正宾语中， that 不可省略。
.
15
whether / if引导的宾语从句
宾语从句为否定句时用if I don’t care ___i_f___ he doesn’t come.
whether / if…or not ( 口语中有时用 if ) I don’t care __w_h_e_t_h_er__/ _if___ he comes or not.
请说出以下句子that 是否可省略
Do you know (that) he has joined the army?
adj. 的宾语
I’m sure (that)he will pass the exam.
由it 作形式宾语时，that 引导的真正宾语中， that 不可省略。
We think it highly probable that he is dead.
well.
.
16
that 引导的宾语从句
宾语从句
whether / if引导的宾语从句
.
17
特殊疑问词引导的宾语从句 陈述语序
I can’t imagine how he did it.
作介词宾语
We are worrying about what we should do next.
.
18
that 引导的宾语从句
whether or not I don’t care _w_h_e_t_h_er_ or not he comes. whether + to do I don’t know _w_h_e_th_e_r_ to go there.
介词后只能用whether
It depends on _w__h_e_th_e_r__ you can do the work
无论谁干了这件工作一定要得到酬谢. Whoever did this job must be rewarded.
.
11
that 引导的主语从句
主语从句
whether / if引导的主语从句 特殊疑问词引导的主语从句
what, wh-ever 引导的主语从 句
.
12
宾语从句
?
连接词
.
13
that 引导的宾语从句：
It’s a pity (that ) we can’t go.
That we can’t go is a pity.
? that 是否可以省略?
that 在句首时绝对不能省.
口语中that引导真正的主语时,that可省.
.
4
3. It is + 过去分词（ said, reported, thought, expected, decided, announced, arranged, ect.) + that 从句
whether / if引导的主语从句
主语从句放于句首，只能用whether 当it 作形式主语，主语从句放在句末 时用whether 或if 均可。
.
8
特殊疑问词引导的主语从句 It makes no difference _w__h_e_re__ we shall have the meeting.
主语从句
that 引导的主语从句
that 置于句首时绝对不能省, 口语中that引导真正的主语 时,that可省.
.
6
whether / if引导的主语从句
翻译:
主语从句放于句首，只能用whether
明天是否开会仍然是个问题.
? _W__h_e_th__e_r the meeting will be given is