主语从句ppt

Whether he is coming is not known.
What does he want
to tell us?
We don’t know what he wants to tell us.
We don’t know
What he wants to tell us is not known.
When will you come back?
It doesn’t matter.
When you will come back doesn’t matter.
It doesn’t matter when you will come back.
改错练习
1.Where shall we spend the holiday isn’t decided. we shall
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.
6. _I_t_ is a fact that English is being accepted as an international language. 7.It worried her a bit _th__a_t her hair was turning grey. 8. The Foreign Minister said, “_I_t is our hope that the two sides will work towards peace.” 9. After Yang Liwei succeeded in circling the earth, w__h_a_t our astronauts desire to do is walk in space.
Grammar
A tree has fallen across the road. You are a student. To find your way can be a problem. Smoking is bad for you.
主语从句
在句中充当主语的从句叫做主语从句。
1.连接词：
1）从属连词：that， whether等. that 引导主语从句只起引导作用，本身 无实际意义，在主语从句中不充当任何 成分，但不能省略。
-- 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.
用it形式主语的that从句有以下四种 不同的搭配：
• I wonder, Mr. Adams, if you’d mind us asking a few questions?
• I can’t say that I have any plans.
• The fact is that I earned my passage by working as an unpaid hand
5.If the policemen will come is not certain. Whether
1.___ he made an important speech at
the meeting was true.
A. That B. Why C. What D. How
2. ___we’ll go camping tomorrow depends on the weather .
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.
It is a fact that……
事实是……
It + 不及物动词 ＋ that从句
It appears that…
似乎…
It happens that ….
碰巧…
It occurred to me that…… 我突然想起……
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。
That she left him cut him to the heart.
That he will come is certain.
由whether及其他连词引导的主语从句 放在句首，句后都可。
Whether it will please them is not easy to say.
2)连接代词who ，what ，which, whatever, whichever, whoever
It is known to us/all that …. 众所周知…
It has been decided that…… 已经决定……
It + be + 名词 ＋ that从句
It is common knowledge that… …是常识
It is a surprise that ….
令人惊奇的是…
It + be + 形容词 ＋ that从句
It is necessary that… It is important that …. It is obvious that……
有必要… 重要的是… 很明显……
It + be + -ed分词 ＋ that从句
It is believed that…
人们相信…
A. is B. are C. has D have
1. _T_h_a_t_ you don’t like him is none of my business.
2. _W__h_a_t he said at the meeting astonished everybody present
3. _W__h_e_th_e_r_ the 2000 Olympic Games will be held in Beijing is not known yet.
Make sentences
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
主语从句后置!
为了避免主语冗长,句子头重脚轻,经常用it作 形式主语,主语从句放在后面作真正的主语.
例:
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.
What seems easy to some people seems difficult to others. Which side will win is not clear.
3)连接副词when，where， how， why等
Why he did it remains a mystery. When they will start is not known yet. How he became a great scientist is known to us all.
A If
B Whether
C That
D Where
3. It worried her a bit ___ her hair was turning gray.
A.whether
B. that
C. what
D. when
4.What I say and think ___ none of your business.
2.You have made a mistake is a fact. That you have
3.That is certain that we can win. It is
4.No matter who leaves the room last ought to turn off the lights. Whoever
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