观察上面对话, 并类比填空。
1. The problem is that we are still short of money.
2. Who do you guess will teach us Chinese next term?
3. Whether they would support us or not is a problem.
4. Whoever wins the game will be chosen to the school team.
5. Tom is no longer what he used to be.
一、主语从句(subject clause)
1. 在复合句中充当主语的从句称之为主语从句, 一般置于句首。
主语从句引导词有:
(1)连词that和whether, 在主语从句中只起连接作用, 不充当任何成分。
(2)连接代词who, whoever, whom, whose, what, whatever, which, whichever, 在主语从句中充当主语、宾语、表语。
(3)连接副词when, where, how, why, 在主语从句中作状语。
*That he worked out the complex problem astonished other students. 
他解决了这个复杂的题目让其他同学感到惊讶。
*When the exam of qualification will be held hasn’t been decided.
资格考试什么时候举行还没决定。
*Whether he will participate in this campus art festival isn’t clear.
他是否参加这次校园艺术节还不清楚。
*What worried the old couple was that their children got involved in the crime.
令这对老夫妇担忧的是他们的孩子参与了这次犯罪。
*Whatever happens you may be quite sure that I will not blame you.
不管发生什么事, 你可以确信我不会责备你。
2. 为了防止句子头重脚轻, 通常把形式主语it放在句首位置, 真正主语置于句末。it作形式主语的常见句型有:
(1)It is a (fact, pity, question, wonder, good thing, surprise ) that. . .
(2)It is necessary (important, strange, natural, etc. ) that sb. should do表达惊奇、不相信、惋惜、理应如此等语气。
(3)It is said (expected, believed, thought, hoped, known, reported, estimated, required. . . )that. . .
(4)It seems(happened/appears/doesn’t matter /makes no difference /occurred. . . )that. . .
*It is well known to all of us that the trees can’t grow without sunlight and water.
众所周知, 树木生长离不开阳光和水。
*It is said that the new adaptation will come out next year .
据说这个新改编本将在明年出版。
*It has yet been decided when the tutor will come to give us a speech. 
这个导师什么时候来给我们做演讲还没定下来。
