Where he will go is unknown. What you said yesterday is right. That he knows Japanese is known to all. Whether he is coming doesn’t matter much.
Complete the sentences using what, whether, where,
7.(__T_h_a_t_ the earth is a solid ball) is known to us all.
Conclusion: 主语从句作主语时，谓语动词一般用单数形式。
4. 主语从句需注意的问题 注 意：
1.“if” 不能引导主语从句，应有“whether”引 导2.主。语从句中用陈述语序 3.主语从句的 “that” 一般不能省。
4.(W__h_ocan join in the sport meet) is decided by the teacher.
5.(_W__h_e_th__er_ it will rain or not) is not clear. 6. (W__h__y the earth is becoming warm) is a good topic for research.
It’s certain . we’ll be late.
It’s certain that we will be late.
That we’ll be late is certain.
Is he coming or
not ？
We don’t know
We don’t know whether he is coming or not
predicative clause 表语从句
Revision
Find the subjects in the following sentences.
1. A tree has fallen across the road. 2. You are a student. 3. To find your way can be a problem. 4. Smoking is harmful to you. 5. What she said is not yet known. 6. That we shall be late is certain. 7. It’s certain that we shall be late.
1. I think “mother” is an important word to
learn and that “mother” is an important
person to love.
object clause 宾语从句
2. It is necessary that we should love our
A. What B. That C. When D. / 2. _______ they can solve the question is still unknown. A. If B. Which C. Whether D. What 3. _____ he said at the meeting astonished everybody. A. Why B. What C. That D. Who
mothers, respect them and take care of them
in future.
subject clause 主语从句
3. My dream is that one day there is no generation gap between our mums and us.
4.“what”引导主语从句时，谓语动词： 1）常与其后的名词作表语一致 2）根据句子的语 境而定。
1.What you left are only several old books.
2.What you said is of great importance.
3.Whether he’ll come here is not clear.
10Where she is from is unknown.
主语从句的引导词：
连词 that , whether 连接代词 who(ever), whom(ever),
which(ever), what(ever) 连接副词 where ,when ,why ,how
汉译英
1.他们是否卖掉这所房子还没有决定。
to say. 3What ss
difficult to others. 4Which side will win is not clear. 5Why he did it remains a mystery.
思考：主语从句有哪些引导词，这些引导词如何选用？
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.
4. _W__h_e_t_h_e_r we’ll go camping tomorrow depends on the weather.
5. W__h_o_e_v_e_r_ leaves the room last ought to turn off the lights.
Make sentences
When will you come back?
When you will come back doesn’t matter.
It doesn’t matter.
It doesn’t matter when you will come back.
1.___ he made an important speech at
A.whether
B. that
C. what
D. when
4.What I say and think ___ none of your business.
A. is B. are C. has D have
1. _____ we need more practice is quite obvious.
Whether he is coming is not known.
What does he want We don’t know what he wants to tell us.
to tell us?
What he wants to tell us is not known.
We don’t know
________they will sell the house is not yet decided. 这里能用if代替whether吗？为什么？
if可以引导主语从句,但不能用于句首,而应 放在句尾, 用it做形式主语.
依据“缺什么补什么”原则确定正确的连词。所谓 “缺什么补什么”是指句型结构与连词之间的关 系。如果句子中缺主语，指人用who，指物用what； 如缺宾语，指人用whom，指物用what；如缺时间 状语用when；地点状语用where；原因状语用why； 方式状语用how；定语用what或which；什么都不 缺用that。
由连词 whether, 连接代词 what, who, which和 连接副词 when,where,why,how 等引导,也常常后置:
注意二
注意：主语从句中 ，谓语动词一般用单数 What引导的主语从句，可根据表语决定
√ • Who will do it ____been decided(have /has)
• What he needs _is_ that book.
• What he needs a_r_e some books.
注意三：What 与 that 引导主语从句
what引导名词性从句时在从句中充当句子成分,如主语,宾 语,表语,而that则不然,它在句子中只起连接作用。
.
(1) W__h__a_t you said yesterday is right. (2) T__h_a_t_she is still alive is a puzzle
用it形式主语的that从句有以下四种 不同的搭配：
It + be + 形容词 ＋ that从句
It is necessary that… 有必要… It is important that …. 重要的是… It is obvious that…… 很明显……
It + be + -ed分词 ＋ that从句
That we shall be late is certain.
-- It’s certain that we shall be late.
1. That the earth is round is known to all.
--It’s known to all that the earth is round.
2. That you missed the chance is a pity.
-- It is a pity that you missed the chance.
It is +adj/n that……(strange/a pity…)
It is + v –ed that…..(…said/reported….
4. ____ is a fact that English is accepted as an international language. A. There B. This C. That D. It