语法高一英语主语从句

3) 连接副词 where, when, how, why等。
How this happened is not clear to anyone.
When he will be back depends on the weather. How the pyramids were built is still a mystery.
改错练习
1.Where shall we spend the holiday isn’t decided. we shall 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 5.If the policemen will come is not certain. whether
1． 引导主语从句的连接词有三类：
(1) 连词that、 whether ：
Whether we go by train or by boat makes no difference. Whether he’ll come here isn’t clear. That price will go up is certain.
4. It’s known to us all ___ a form of energy .
A. water is C. is water B. that water is D. that water to
5. It worried her a bit ___ her hair was turning gray. A. whether B. that C. what D. when
It is certain that she will do well in her exam.
B. It+be+名词词组 (no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从 句。如： It’s a pity that we can’t go.
Subject Clauses 主语从句
1. 主语从句：从句在句中充当主语成分
1). That he will succeed is certain . 2) Whether he will go there is not known . 3) How we can help the twins will be discussed at the meeting.
3.___ is known to us all is that America is a developed country____the First World.
a.Which; belong to
c. What; belonging to
b. As, belonged to
d. It; belonging to
(2) 连接代词 who, whom, whose, what, which, whoever, whatever, whichever等
What she did is not yet known.
Who will write the poem has not been decided yet. Whatever he did is right.
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 . A If B Whether C That D Where
6.What I say and think ___ none of your business. A. is B. are C. has D have
It happened that I was out that day. E. It+doesn’t matter (makes no difference, etc.)+连接代词 或连接副词引起的主语从句。如： It doesn’t matter whether she will come or not.
-- 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.
2. 用it 作形式主语的结构
A. It+be+形容词 (obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。如：
C. It+be+过去分词 (said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。如： It is said that Mr. Green has arrived in Beijing. D. It+seem, happen等不及物动词及短语+that从句。如：
4. 主语从句需注意的问题
导。 2.主语从句中用Biblioteka Baidu述语序
注 意：
1.“if” 不能引导主语从句，应有“whether”引 3.主语从句的 “that” 一般不能省。
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.
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.