主语从句精品课件

2.That they should like each other is natural. _I_t _is__n_a_tu__ra_l_t_h_a_t_t_h_e_y_s_h_o_u__ld__li_k_e_e_a_c_h__o_th__er.
这样就构成了下面一些常用句型: 1) It is + n. +从句
(四). 判断以下句子是否正确： They should like each other is natural. 错误
That they like each other is natural. 正确
It is natural that they like each other. 正确
That引导的主语从句放句首，既不充当成分又无意义， 但that不能省去。
名词性从句包括： 宾语从句：介宾结构；动宾结构 表语从句：系表结构(系动词后面跟一个从句) 主语从句: 一个句子做主语 同位语从句：对名词进行解释说明
判断下列从句： 1.China is no longer what she used to be. 2.The question remains whether they will be able to help us. 3.It seemed as if I couldn't think of the right word.
When they will leave is not decided.
(4). 连接代词：who(谁，主格); whom(谁；宾格); whose(谁的); what(什么…事/话…); which(哪一个); whoever(无论谁), whatever(无论什么), whichever(无论哪一个) 在句子中担任主语， 宾语，表语或定语

Pay attention:此主语从句缺少成分-宾语， 故用作成分的what来引导，而不用that。
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引导词
3)连接代词whoever, whatever, whichever • Whoever comes is welcome. • Whatever I have is yours. • Whichever you want is yours.
Module 3
Noun clauses as the subject
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什么是主语
I like English. The train left.
主语：句子说明的人或事物,一般 位于_句__首___ 。
.
找出主语
Jane is good at playing the piano.(名词) To see is to believe. （不定式） Smoking is bad for health. （动名词） What he has said is true. (从句）
whatever=anything that whoever=anyone who
.
引导词
4) 连接副词when, where, why,how
• When we will leave hasn’t been decided.
• How she keeps healthy is a secret.
2. 语序：陈述句语序
.
That he will win the match is certain. It is certain that he will win the match.
注解：一般来说主语从句都是放在 句首 , 但有时为了使句子 保持平衡 ,避免”头重脚轻”, 常用 it 作 形式主语 ，从而把主语从句放在 后面 ．

主语从句可以包含丰富的信息， 包括时间、地点、条件、原因等
，使表达更加准确具体。
通过主语从句可以精确地描述某 个事件或情况，避免歧义和误解
。
主语从句还可以用来表达复杂的 观点和态度，使文章更具深度和
说服力。
增加文采和感染力
主语从句可以采用多种句式和表达方 式，如倒装句、强调句等，增加文章 的文采和感染力。
连接代词和连接副词引导的主语从句一般放在句首，谓语动词用单数形式。
连接代词what和which在引导主语从句时，有时可以互换使用，但which更强调选 择范围。
主语从句时态、语态和语气
03
问题
时态问题
主语从句时态与主句时态一致
01
主语从句中的动词时态通常与主句中的动词时态保持一致，表
示同时发生的动作或状态。
当主语从句中的主语是表示数量的短语（如a number of, the majority of等）时，谓 语动词的单复数形式取决于短语所修饰的名词。
主语从句中的主语是并列结构时，谓语动词用复数形式
当主语从句中的主语是由and连接的并列结构时，谓语动词用复数形式。
练习题讲解
选择题
通过选择题的形式， 让学生判断主语从句 中主谓一致问题的正
当主语从句中的主语是复数形式时，谓语动词必须与主语保持一致，也用复数形式。
特殊情况处理方法
主语从句中的主语是不定代词时，谓语动词用单数形式
当主语从句中的主语是不定代词（如something, nothing, anyone等）时，谓语动词 用单数形式。
主语从句中的主语是表示数量的短语时，谓语动词用单数或…
主语从句与形式主语的区分
形式主语it代替真正的主语从句，使句子结构更加平衡。需注意形 式主语与真正主语的区分。

*it 为形式主语
2.That they should like each other is natural. _I_t _is__n_a_tu_r_a_l _t_h_a_t _t_h_e_y_s_h_o_u_ld__li_ke__e_a_c_h_o_t_h_e_r._
这样就构成了下面一些常用句型: 1) It is + n. + 从句
子结构平衡, 避免 “头重脚轻”, 常用 it 作形式
主语, 而把从句放在后面。 例如:
1. That he will refuse this piece of advice is impossible. __I_t _is__im__p_o_ss_i_b_le___th_a_t_h_e__w_i_ll_r_e_fu_s_e_t_h_is__p_ie_c_e__ __o_f_a_d_v_ic_e_.______________________________
and think about what are the connectors ( 连接词) .
1That he will come is certain. 2Whether it will please them is not easy to say. 3What seems easy to some people seems difficult to others. 4Which side will win is not clear. 5Why he did it remains a mystery. 6When they will start is not known yet. 7How he became a great scientist is known to us all. 8Who will take part in the meeting has not been decided. 9Whoever breaks the law will be punished. 10Where she is from is unknown.

接下来我们来看看主语 从句中从句引导词的各 种用法
灵活运用
✓ 从属连词 ✓ 连接副词 ✓ 连接代词
灵活运用
that,whether
从属 连词
when, where, how, why
连接 副词
连接 代词
who，what，which， whatever, whichever, whoever
灵活运用
It 作形式主语和it引导强调句的比较
而强调句则不同，它的结构是： It+be+被强调部分+that+从句
强调主语：It is the times that produce their heroes. (时势造英雄) 强调宾语：It is English that Prof.Lin teaches us. 强调状语：It was in shanghai that I saw the film. 判断是否是强调句有一个方法，就是将that以后的“句 子的其余部分”拿出来单独看，看有没有缺成分，缺的 是什么成分，再把谓语动词后面that前面的那部分，带 到你认为缺成分的地方，如果放进去是一句完整的句子 了，那就说明是强调句。
It 作形式主语和it引导强调句的比较
为避免头重脚轻，常以形式主语 it引导从句。 It+形式主语谓语+从句。
例：It is known that... It is shown that... 用it 作形式主语的结构 (1) It is +名词+that从句 It is a fact that … 事实是…… It is an honor that …非常荣幸 It is common knowledge that …是常识 (2) it is +形容词+that从句 It is natural that… 很自然…… It is strange that… 奇怪的是…… (3) it +不及物动词+that从句 It seems that… 似乎…… It happened that… 碰巧…… (4) it is+过去分词+that从句 It is reported that… 据报道…… It has been proved that… 已证实……

第二讲：主语从句的引导词及各 类主语从句
主语从句在复合句中作句子的主语。 引导主语从句的词有从属连词that, whether, if；连接代词who, whoever, whom, what, whatever, whose, which； 连接副词when, where, how, why等。
surprise/no wonder难怪/good news/a good thing/a question /that… …是事实
It is common knowledge that… …是常识
*_It__is__a__p_it_y__th__a_t_(很遗憾)we lost the match.
句子
简单句 复合句
并列句
形容词性从句 名词性从句 副词性从句
定语从句
主语从句 subject clause
宾语从句 object clause
表语从句 predicative clause
同位语从句 appositive clause
比较状语从句 地点状语从句 时间状语从句 让步状语从句 条件状语从句 目的状语从句 方式状语从句 结果状语从句 原因状语从句
*____I_t _is_r_e_p_o_rt_ed__th_a_t_(据报道)20 people were killed in the accident.
*___It_i_s_s_u_g_g_es_t_e_d_th_a_t__(建议)we should eat more vegetable and do more exercise.
特殊疑问句作主语
• 需要先将疑问句的倒装语序变成陈述句语 序。
Why dinosaurs became extinct is still a mystery.

注意： (1)从句作主语谓语动词常用单数，但如果 what 引导的从句作主语，后跟名词作表语 时，谓语动词则由表语名词的数量决定。 What he told me is true. 他告诉我的是真的。 What he saw were some new comers. 他看见的是些新来的人。
(2)It is said that sb.do sth.的复合句形式可转化为简单句sb.be said to do sth.， 而且在简单句中常考查 to do 的具体形式。 (3)it 引导的强调句与 it 作形式主语的复合句的区别。 it 引导的强调句是用来对句中除谓语外某一成分加以强调，其结构为“It is/was＋ 被强调部分＋that/who...”。如果被强调的主语是“人”，则可用 who 或 that， 如果被强调的部分是其他成分时，必须用 that。 It was I that/who met John in the street yesterday. 是我昨天在街上遇到了约翰。(强调主语) It is a pity that you didn't go to see the film. 你没去看电影很可惜.ppt
演讲人
1．主语从句位于句首。 Who kept the door open all night was unknown. 不知道是谁让门整晚开着。 2．主语从句位于句尾，使用it作形式主语。 it作形式主语置于句首的结构 (1)“It＋be＋形容词＋that clause”结构，常用于这种句型的形容词有： fortunate，possible，(un)likely，strange，probable，true，certain等。 It is strange that no one wants to go there. 真奇怪，竟然没有人想要去那里。

×
Whether we will…………………………. decided yet.
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20 Translate the sentence
*It is known to us___h_o_w__M_a_r_k_T_w__a_in___ _b_e_c_a_m__e__a_g_r_e_a_t_w_r_i_te_r__(马克.吐温怎样成 为一位伟大的作家).
• 连接词 that , whether
• 连接代词 who(ever), whom(ever),
which(ever), what(ever)等
• 连接副词 where ,when ,why ,how
第3页/共34页
it
That he will refuse this piece of advice is impossible.
10
*It is important that we will finish the
work on time.
×
It is important that we should finish…..
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Correct or not?
10
*That she wants to know is when the
3. _____ he said at the meeting astonished everybody. A. Why B. What C. That D. Who
4. ____ is a fact that English is accepted as an international language. A. There B. This C. That D. It