- 中文名
- 表语从句
- 外文名
- Predicative Clause
- 具 体
- 英语语法
- 作 用
- 用一个句子作为表语
A
The problem is puz热套劝zling.
这个背台牛问题淋纹令人困惑。
盼签燥主语+连系动词+形容词作表语
The problem is when we can get a pay rise.
悼重臭拜问题是什么时候我们良旬奔可以得到加薪。
B
连接表语从句的连接词有：that, what, who, when, where, which, why, whether, how, whoever，whichever ，whatever等。还有如because, as if, as though等。
- His suggestion is that we should stay calm.他的建议是，我们应该保持冷静。
- The question is when he can arrive at the hotel.问题是，他什么时候可以到达酒店。
英语里一个词可以同时拥有多种词性—— 如：表语从句 This is where he lives。①where在主句中作表语，是代词词性；②where引导表语从句，是（从属）连词词性；③where在从句中充当状语，是副词词性。
表语是用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、形容词、副词、介词短语、不定式、动词的-ing、从句来充当，它常位于系动词（be, become, appear, seem,look,sound,feel,get,smell等词）之后。如果句子的表语也是由一个句子充当的，那么这个充当表语的句子就叫做表语从句。
一、名词作表语
- Africa is a big continent.非洲是个大洲。
- That remains a puzzle to me.这对我还是个难题。
二、代词作表语
- What’s your fax number?你的传真号是多少？
- Who's your best friend?你最好的朋友是谁？
三、形容词作表语
- I feel much better today.我今天感觉好多了。
- He is old but he is healthy。他很老，但他很健康。
- She was the first to learn about it.她是第一个知道的人。
五、不定式作表语
- Her job is to sell computers.她的工作是销售电脑。
- Our next step was to get raw materials ready.我们下一步是把原料准备好。
- The purpose of new technologies is to make life easier, not to make it more difficult.新技术的目的是使生活更便利，而不是更繁琐。
- Her wish is to become a singer.她的愿望是当一名歌手。
- Our plan is to finish the work in two weeks.我们的计划就是在两星期内完成这项工作。
六、介词短语作表语
- The patient is out of danger.病人脱险了。
- I don’t feel at ease.我感到不自在。
七. 副词作表语
- The sun is up.太阳升起来了。
- I must be off now.我得走了。
- This is what he said.这就是他所说的话。
表语从句的注意事项
A
- False: The question is when can he arrive at the hotel.
- Right: The question is when he can arrive at the hotel.
B
if不能引导表语从句，只能用whether 来引导。
- False: The question is if the enemy is marching towards us.
- Right: The question is whether the enemy is marching towards us.
C
- Right: The question is who will travel with me to Beijing tomorrow.
- Right: The question is why he cried yesterday.
D
例如：
- That is what I want to tell you.那就是我想要对你讲的。（what在表语从句中充当直接宾语）
又如：
- That is why I came.这就是我来的原因。
下面是两个与“That is why...”形式相似的结构， 它们与“That is why...”结构之间的关系要能够辨析清楚：
(1)“That is why...”与“That is the reason why...”同义， 只不过从语法结构上讲， “That is the reason why...”中why引导的是—个定语从句， 将其中的the reason去掉则与“That is why...”结构一样， 例如：
- That is (the reason) why I cannot agree.这就是我不能同意的理由。
(2)“That is because...”句型中从属连词because引导的名词性从句在此作表语， 这也是个常用句型， 意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由， “That is why...”则指由于各种原因所造成的后果， 例如：
- He did not see the film last night. That is because he had to help his little sister with her homework.昨天晚上他没有去看电影， 那是因为他得帮助他的妹妹做作业。（第一句话说明结果， 第二句话说明原因）
- He had seen the film before. That is why he did not see it last night.他以前曾看过那部电影， 因此他昨天晚上没有去看。（第一句话说明原因， 第二句话说明结果）
考题1
The traditional view is ____ we sleep because our brain is “programmed” to make us do so. (2007上海)
A. when B. why C. whether D. that
[答案] D
传统的观点是因为我们的大脑已经设定好让我们睡觉，所以我们睡觉。
考题2
A. why B. where C. what D. how
[答案] B
[解析] 下划线处的引导词引导系动词is后的表语从句并在该表语从句中充当地点状语（“disagree”属于不及物动词， “I disagree”本身是完整的主谓结构）， 下划线应填入引导词where， 表语从句“where I disagree”的意思是“我不同意之处、 我不同意的地方”。
你说每个人都应该是平等的,这是我所不同意的。
考题3
— I drove to Zhuhai for the air show last week.
— Is that ____ you had a few days off? (1999)
A. why B. when C. what D. where
[答案] A
—那就是你请了几天假的原因吗？
考题4
____ she couldn’t understand was ____ fewer and fewer students showed interest in her lessons. （2000上海）
A. What; why B. That; what C. What; because D. Why; that
[答案] A
[解析] 第一个下划线处的引导词引导主语从句并在该主语从句中充当宾语， 特指她所不理解的事情， 应填入关系代词型的引导词what； 第二个下划线处表示“因此……”（指因某种原因所造成的后果， 由why引导对应的名词性从句）而不是“为什么……”（指原因、 理由， 由because引导对应的名词性从句）， 应填入引导词why。
她所不能理解的是为什么越来越少的学生对她的课感兴趣.
考题5
____ made the school proud was ____ more than 90% of the students had been admitted to key universities. （2003上海春）
A. What; because B. What; that
C. That; what D. That; because
[答案] B
[解析] 第一个下划线处的引导词引导主语从句并在该主语从句中充当主语， 特指令校方骄傲的事情， 应选用关系代词型的引导词what； 第二个下划线处引导表语从句表示原因、 理由， 应由that引导对应的名词性从句。
考题6
— Are you still thinking about yesterday’s game?
— Oh,that’s ____. （2003北京春）
A. what makes me feel excited B. whatever I feel excited about
[答案] A
[解析] A选项的意思是“令我感觉激动的事物”； B选项的意思是“我觉得激动的任何事物”； C选项的意思是“我对它感觉的方式”； D选项的意思是“令我感觉激动的时候”。四个选项中A最适合跟代表“game”的主语that对应， 充当表语从句。
你在想昨天的比赛吗？
哦，那（比赛）真让我感到兴奋。
- This is what I want.这就是我想要的
- The reason why he was late is that his bike broke down.他迟到是因为自行车坏了
- Next sunday is when we shall meet.下周日是我们见面的时间
- This is why I am late.这就是我迟到的原因
- My problem is which computer to choose我的问题是不知道选哪个电脑好
- The argument is whether it rains tomorrow明天是否下雨是争论的内容
- What the police want to know is when you entered the room警察想知道的是你什么时候进的房间。
- The trouble is that we are short of funds困难是我们缺乏资金。
- This is what we should do这是我们应当做的。
- That‘s why I want you to work there那就是我要你在那儿工作的原因。
- His first question was whether Mr. Smith had arrived yet他的第一个问题是史密斯先生到了没有。
as if,as though,because也可用来引导表语从句。
- She seems as if she had done a great thing她看起来好像做了一件大事。
- It is because you eat too much是因为你吃得太多了。
（1）对于宾语从句要掌握以下三点
