that 只有引导定从才做成分
• 5．what与that在引导主语从句时的区别 • what引导主语从句时在从句中充当成分，如
主语、宾语、表语等；that则不作任何成分， 只起连接作用。
• ①What has made him mad is not known yet. • (what在从句中作主语) • ②What you said yesterday is right. • (what在从句中作said的宾语) • ③That she is still alive is a consolation. • (that不作任何成分)
(引导名词性从句的关联词):
从属连词 that, whether, if，
(不作成分）
连接代词 what, who, whom, （作成分） whose, which, wh+ever 连接副词 when, where,why,how
（作状语）
9
1.引导词 that
that放在句首引导主语从句，在主语从句中 不充当任何成分也无实际意义。但是不能省略。
It + be + 名词 ＋ that从句
It is a pity that… It is a surprise that …. It is a fact that……
遗憾的是…… 令人惊奇的是…… 事实是……
It + 不及物动词 ＋ that从句
It appears/seems that… 似乎……
★_W__h_a_t he offers is what I need.
★ _W__h_at__ they are most interested in is
how they can produce more and better cars.
比较 that / what
1._W__h_a_t_ he wants is a book.
1)_W_h__a_t you said yesterday is right. 2)_T_h_a_t_ she is still alive is a comfort（安慰）.
3)_T_h_a_t_ he lost the bike worried him a lot.
4)_W__h_a_t caused the accident remains unknown. 5) _W__h_a_t matters was_w_h_a_t you choose. 6) _W__h_a_t we can’t get seems better.
地点状语
➢（W___h_e_r_e he will go）is unknown, maybe Xi’an.
原因状语
➢（_W__h_y_he did it like thi）s remains a mystery,
nobody knows the reason.
方式状语
➢（_H__o_w__ he solved the problem）is unknown.
3. What is needed for a long trip is careful
preparation. 该句中从句部分是 _W__h_a_t_i_s_n_e_e_d_e_d__fo_r__a _lo_n_g__t_r_ip__，junctions of Noun Clauses
课程：(Book3）Unit 4
Grammar 主语从句
(Book3）
What can you see in the picture?
What I can see is … What I can see is a face of a beautiful girl. What I can see is a face of a witch.
肯定… 重要的是… 很明显……
It + be + -ed分词 ＋ that从句
It is said that… It is suggested that… It is known to us/all that …. It has been decided that……
据说… 有人建议… 众所周知… 已经决定……
主语从句时，谓语动词用单数。
➢When we will go _h_a_s__(have) not been decided yet.
➢When and where we will go __h_a_s_( have) not been decided yet. ➢When we will go and where we will go h__a_v_e_(have) not been decided yet.
(be) a wonder. Where he will get a job after graduation
__p_u_z_z_le_s_/h_a_s_p_u_z_z_le_d__(puzzle) him much.
由and 连接两个或两个以上的主语从句作主语
时，谓语动词用复数；由两个或多个连接词引导一个
2. _T_h_a_t_ he wants to go there is obvious.
总结：名词性从句中
what
充当必要成分 如主语、宾语、表语
that 不做成分,无实际意义, 只起连接作用，但不
3.The first museum _t_h_a_t_能h省e略visi定ted语i从n 句
China was the History Museum.
★_T_h_a_t_the sun rises in the east and
sets in the west is known to all.
★她能来帮助我们使我们很高兴。
That she could come to help us made us very happy.
2.引导词 what
在从句中充当句子成分，如主语、宾语、表语等， 译为“...所...的”, 相当于the thing(s) that…, all that 或 everything that…
Find the subject of each sentence.
A book is on the desk.
n.
You are a student.
pron.
Smoking is bad for you.
verbal noun
To play basketball with him is a pleasant tinhfiinngit.ive phrase
It happens that ….
碰巧……
It occurred to sb. that…… 某人突然想起……
用it形式主语翻译下列句子:
1、学生学好英语很重要。
It is very important that students should learn English well.
时间状语
➢ （When he comes）depends on the bus.
3.主语从句中既充当句子成分， 也具备语义的引导词:
who(ever),whom(ever),whose, which(ever), what(ever), , 在主语从句中作主，宾，表，定
Whoever breaks the rules will be punished. Whoever comes to the party will receive a gift. Whatever he did was right.
What I can see is a face of a beautiful girl.
Subject Clause (主语从句)
Noun Clauses (名词性从句)
Object Clause （宾语从句）
Predicative Clause （表语从句）
Appositive Clause （同位语从句）
。
That we should learn English well is important.
It is important that we should learn English well.
Formal Subject
Real Subject
Whether you are right is uncertain.
2. Whether we will travel abroad or not
has not been decided. 该句中从句部分是 _W__h_e_t_h_e_r_w_e__w_i_ll___ _tr_a_v_e_l_a_b_r_o_a_d__o_r_n_o_t_，引导词为 __w_h_e_t_h_e_r_。
3.引导词 whether whether在主语从句不充当任何成分； 意为“是否”,主语从句中不可使用if.
Whether
________he'll take part in the game (or not ) is none of my business.
主语
_（__W__h_o_e_v_erbreaks the law s）hould be punished.
It is uncertain whether you are right.
Formal Subject
Real Subject
It + be + 形容词 ＋ that从句
It is certain that… It is important that …. It is obvious that……
4. 主语从句需注意的问题
从句中要用陈述语序 How does he become a great scientist? It puzzles him