_w_h_e__th_e_r_ the old man will recover soon. 8. I haven’t decided w__h_e_t_h_e_r to go there.
总结：
2.不能使用if 的情况: a. ___主__语___、__表_语___、_同__位__语_ 从句。 b. __介___词后的宾语从句。 d. 与 _o_r_n_o_t_连在一起引导宾语从 句。 c. 后面直接跟__动__词_不__定__式__当宾语。
谓语动词/介词
系动词
When we shall hold the meeting depends on whether John can return tomorrow. The problem is when John will come back.
名词
We expressed our hope that we could visit the country again.
连词选择总原则： 看从句中缺少什么成分，根据意思选择适当 连接词语；如不缺成分且句意完整，则选用 that.
一找 ：从句 二查 ：缺少什么成分 三选 ：意思适合的连接词
Who will be the winner?
Part A: Have a try: Choose a proper conjunction. 1. W__h_a__t has been announced is that we must hand
3.Historically ,it was famous for industry ,which explains16._w_h_y___the area is called the black country.
(2011年广州一模）
4. Hic ! You’ve just hiccupped（打嗝） for the tenth time since you finished dinner. Wonder 16.__w__h_e_re___these funny noises are coming from? (2011年广州二模）
in our graduation papers before the end of June.
2.T_h_a_the always serves the people is well-known. 3.W__h_e_nthe English evening will be held, on
Monday or Tuesday, has not yet been decided.
总结
1.名词性从句连接词的选用
(1) that 和what 的选用
that 和 what 都可引导所有的名词性 从句。但是，__w_h_a_t_除起连接作用外， 还在名词性从句中充当成分，可作从 句的_____主、语______宾、语或____。表语而 ____th_a在t 名词性从句中不充当任何成 分，只起___连__接__作用。
What’s more, 8.__w_h_a__t ___attracts people to Californian is its pleasant climate and relaxed lifestyle. This is 9.__w_h__y___each year a great number of people from all over try to immigrate to Californian. However, most applications know 10._t_h_a_t__they have little chance of getting a visa.
15,000 years ago.
Scientists believe 6._t_h_a_t___these settles crossed the Bering Strait in the Arctic to American by means of a bridge 7._w__h_ic_h_ existed in prehistoric times.
Appositive Clause
名词性从句 诠案p.14
由连__接__词_引导，在复合句中起名__词__作用的从句叫 名词从句 ( Noun Clauses)。它在复合句中能担任 _主__语__、__宾__语_、__表__语__、__同__位_语__、__介__词__宾_语________ 等，因此根据它在句中不同的语法功能，名词从 句又可分别称为 _主_语__从__句__、__宾_语__从__句__、__表_语__从__句__和__同__位_语__从__句_。
连接词+名词性从句(陈述句语序即主+谓)
Find the clauses and tell the function of them: 1.It is known to you all that I am an English teacher.
Subject Clause
2.You know tthhaattIIaammaannEEnngglliisshhtteeaacchheerr..
Object Clause
2.他也指出导致近视（ short-sightedness） 的原因是如此的复杂,到目前为止没有哪一 种药物能治愈近视 。（09基础写作） What he also pointed out is _th_a_t_t_h_e_c_a_u_s_e_s_f_or s_h_o_rt_-_si_g_h_te_d_n_e_s_s__a_r_e_s_o_c_o_m__p_li_c_at_e_d_______ and that up till now no medicine can cure short-sightedness.
4. I want to knoww__h_a_t he has told you. 5. Everything depends onw__h_e_t_h_e_rwe have money. 6. That is _w_h_y__ he didn’t come to the meeting.
7. The newst_h_a_t_ we won the game was exciting.
Subject Clause
4.同时，专家的另外一个建议是这个问题写 作时如何握笔有关 。（09基础写作）
Meanwhile another tip from the experts __i_s_t_h_a_t _th_e_p_r_o_b_l_em__h_a_s___ _b_u_s_in_e_s_s_w_i_th__/i_s_r_e_la_t_ed__to__h_o_w_w__e___ _h_o_l_d_t_h_e_p_e_n_w_h_i_le__w_r_it_in_g_._________.
Predicative Clause
3.建议: 我们学生不要过度用眼；多参加户 外活动。（ 09基础写作）
_It_i_s_s_u_g_ge_s_t_ed__th_a_t_w__e_s_tu_d_e_n_t_s _n_o_t _______ _ov_e_r_u_s_e_o_u_r_e_y_esand it’s of great help to our eye health to participate in more outdoor activities
1. I asked her _if_/_w__h_e_t_h_e_r she had a bike. 2. _W_h__e_th_e__r we will hold a party in the open
air tomorrow depends on the weather. 3. We’re worried about _w__h_e_t_h_e_r he is safe. 4. I don’t know _w__h_e_th__e_r___ he is well or not. 5. I don’t know _w_h_e__th_e_r_ or not he is well. 6. The question is _w_h__e_th_e_r_ he should do it. 7. The doctor can hardly answer the question
that / what
1.W__h_a_t__ he wants is a book. 2. T__h_a_t__ he wants to go there is obvious. 3. The result is _t_h_a_t__ we won the game. 4. This is w__h_a_t_ we want to know. 5. I don’t knoww__h_a_twill happen nextபைடு நூலகம் 6. He is no longerw__h_a_the used to be. 7. I have no doubt _t_h_a_t_ you will succeed.
1.调查表明一半的女孩选择电影或者电视明星 作为他们的偶像(idols)，而48%的男孩支持 喜欢体育明星。（07基础写作）
The survey s_h_o_w_s_t_h_a_t_h_a_lf_o_f_t_h_e_g_ir_l_s_ c_h_o_o_s_e _fi_lm__o_r_T__V_s_t_ar_s_a_s_t_h_e_ir_i_d_o_ls_,___ while 48% of the boys favor sports stars.
Object Clause
3. What I am worried about is whether you can do well
iinn tthhee eexxaamm..
Subject Clause
Predicative Clause
4. The fact that II am aann EEnglish tteeaacchheerr is known to you all.