主语从句超全

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.
Why did dinosaurs become extinct is still a mystery.
恐龙为什么会灭绝目前还是个未解之谜。
怎样找出主语从句以及主句和从句
That he will succeed is certain. Whether he will come makes no
difference. What we need is more time.
结论；判断主语从句的方法；先找到谓语，谓语 之前的句子就是主语从句。位置：通常放在主 句谓语动词之前或由形式主语it代替, 而本身放 在句子末尾。
has not been decided. 该句中主语从句是 _W__h_e_t_h_e_r_w__e_w_i_l_l __ _tr_a_v_e_l_a_b_r_o_a_d__o_r_n_o_t_，引导词为 _w_h__et_h_e_r__。
4. Whoever knows the secret mustn’t tell
ຫໍສະໝຸດ Baidu
5）.it+特殊动词+that 从句常用 于这种特殊结构的动词； seem,appear显得，happen碰 巧/doesn't matter/make no difference/occured 主语从句不 可提前。
.2.主语从句不可位于句首的五种情况
1）.if引导的主语从句不可距于复合句句首
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。
effective.
3) It +不及物动词+从句
It happened that...
碰巧……
It occurred to me that…我突然想起…
*_I_t_h_a_p_p_e_n_e_d__t_h_a_t_(刚好)I came into the office at that time.
*_I_t _o_c_c_u_r_re_d__t_o_m__e_t_h_a_t_(我突然想起)I forget to sent the letter.
*____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.
Noun clauses as the subject
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_i_s_a__f_a_c_t_t_h_a_t_(这是事实)he cheated in the exam.
2) It is /系动词+ adj. +从句 常见的形容词是
It’s certain that… 肯定… It is possible that... 很可能…… It is（ un）likely that... 不可能…… It is obvious that… 很明显… It is necessary \important \natural\clear/right/strange/true/good/wonderful/quite/unusual /evident/worthwhite/surprising/interesting/astonishing/doubtful/essential/...
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.
2）.It + be +过去分词+从句 3）.It doesn't matter how/weather......结构中的主语从句 不可提前。
4）it+特殊动词+that 从句常用于这种特殊结构的动词； seem,appear显得，happen碰巧/doesn't matter/make no difference/occured 主语从句不可提前。 5）含主语从句的复合结构是疑问句时，主语从句不可提前。
主语从句的结构：句子+谓语 连接词所连接的句子是从句，从句和之后的谓语 构成主句。
主语从句+谓语 主语从句的句序：
it（形主）+that（真主）
充当主语的句子
• 陈述句 （用that引导） • 一般疑问句 （用whether引导） • 特殊疑问句 （用when, where, why, how,
It is believed that...据信……;人们相信……
It is suggested that + (should）do... 建议……
It must be admitted that…必须承认……
It cannot be denied that… 不可否认……
It must be pointed out that…需指出的是……
others. 该句中主语从句是_W__h_o_e_v_e_r__k_n_o_w_s__th_e_ _s_e_c_re_t_，引导词为__w_h_o_e_v_e_r。
5. It remains a puzzle why dinosaurs died
out suddenly long time ago. 该句中主语从句是_w__h_y_d_i_n_o_s_a_u_r_s_d_i_e_d o_u__t _s_u_d_d_e_n_ly__lo_n__g_t_im__e_a_g_o_，引导词为 _w_h_y__。
练一练
【例句呈现】 观察下列例句，指出其中所包含的主语 从句及引导词: 1. What is needed for a long trip is careful
preparation. 该句中主语从句是 _W__h_a_t_i_s_n_e_e_d_e_d_f_o_r_a_ _l_o_n_g_t_r_ip__，引导词为 _w_h_a_t_。
主语从句 (Subject Clause)
第一讲:主语从句的概念，什么是主语从
句。在句子中充当主语的就是主语从句。
英语名词从句成分的划分是根据句子在从句中的 位置划分的，任何一个句子一旦位于某个成分的 位置上，它就成了相应的 ......语从句
如何理解主语从句
他通过了考试让老师很高兴。
He passed the exam. It made the teacher happy. He passed the exam made the teacher
2. That Jay Zhou will come to my city
excites everybody. 该句中主语从句是 _T_h_a_t_J_a_y__Z_h_o_u__w_i_ll_ _c_o_m_e__to__m_y__c_it_y_，引导词为__th_a_t_。 3. Whether we will travel abroad or not
happy. That he passed the exam made the teacher happy.
理解主语从句
他何时要来还不清楚。 When will he come? It is not clear. When will he come is not clear.
When he will come is not clear.
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）
who, whom, what, which, whose等引导）
一般疑问句作主语
• 需要先将疑问句的倒装语序变成陈述句语 序，并在句首加上whether来引导，以保留 原句的疑问意义。
Whether he will come to my party makes no difference to me. 他来不来参加我的聚会对我来说无所谓。
known/estimated/expected/hoped//noted/required/demanded/made
clear/discussed/
It is said that...
据说……
It is known to all that... 众所周知……
It is reported that... 据报道……
4) It + be +过去分词+从句 这些动词有advised有人说
/announced据宣布/consider据认为/decided作出决定/found out据查明
/heard有人听说/hoped有人希望/ordered根据命令/pointed out有人指出
/remembered有人记得/told据告知/thought有人认为/turned out结果/well
That he will come is certain.
1. 主语从句有时为了使句子结构平衡, 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_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
一.that 引导
1.that 引导的主语从句，不做成分，无意义，通常不能 省略，在句中具有“两不”原则：
一、不作句子成分； 二、没有实际意义。 当它引导的主语从句置于句首时，that不能省略；如果
用it作形式主语，则把主语从句放在句末。若that引导 的主语从句位于句末，而在句首用了形式主语it，则 that可以省略。It was a pity (that) you didn't go to the talk
that… +(should) +do…
这类主语从句中，谓语动词很多为（should )+动词原形
*_I_t_is__p_o_s_s_i_b_le__th_a_t__(很可能)she will come back tomorrow. *__It_i_s_o__b_v_io_u_s__th__a_t _(很明显)this measure is
*it为形式主语
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 /系动词+ n. +从句 It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact/ a problem/a wonder/an honner/a