高中英语表语从句讲解及专项练习
概念：表语从句是一种名词性从句，用于复合句中作为表语。它通常放在系动词之后，结构为“主语+系动词+表语从句”。常见的连系动词有be。look。remain。em等。
可以接表语从句的系动词包括：
1.be（being,been,am,is,are,was,were)
2.feel。em。look。appear。sound。taste。smell
3.stand。lie。remain。keep。stay
4.e。get。grow。turn。go。come。run。fall
5.prove。turn out
whammy
例如：
We are short of money。which is causing trouble.（我们资金短缺，这造成了麻烦。）
XXX New England fields。which is why.（在新英格兰，用石头墙而不用栅栏的原因是什么。）
At that time。I couldn't em to think of the right word.（当时，我似乎想不出一个恰当的字眼。）
表语从句可以由从属连词that、whether、as though、as if引导，也可以由关系代词和关系副词引导。
从属连词that在引导表语从句时无词义，而whether有词义，表示“是否”。主句的主语通常是抽象名词，n（问题），trouble（麻烦），problem（问题），result（结果），chance（可能性），n（建议），idea（想法），reason（理由）等。表语从句对主句主语进行说明、解释，使主语的内容更具体化。
例如：
XXX is whether we should go or stay.（问题是我们应该去还是留下。）
XXX.（麻烦在于我们没有足够的时间。）
因为，好像，仿佛等连词引导的表语从句，从句中的内容是原因、方式、程度等。例如：He was late becau he misd the bus.他迟到了，因为他错过了公交车。
XXX XXX.她的行为好像她什么都知道。
XXX XXX days.他看起来好像已经好几天没睡觉了。
startupIt appeared as though snow was imminent。This was due to our lack of XXX.
协作消费
Note:
A。XXX.
Fal: XXX is when can he arrive at the hotel.
Correct: XXX is when he can arrive at the hotel.
B。"XXX" should be ud to introduce predicate claus。except for "as if"。"If" and "whether" can be interchanged when introducing object XXX appositive claus。"whether" should be ud.
甲烷燃烧现象Fal: XXX.
Correct: XXX.
Correct: It looked as if he had XXX.
C。Unlike object claus。the tens in the main clau and predicate clau do not have to match in XXX。subject claus。or appositive claus.
Correct: XXX is who will travel with me to Beijing tomorrow.surpri什么意思
cdceCorrect: XXX is why he cried XXX.
D。"That" XXX.
Basic Usage:
字典 在线Predicate claus can only be placed after the main clau。and the verb in the main clau must be a linking verb。When a noun clau is ud as a predicate after a linking
verb。it is called a predicate clau。For example: "The problem is how we can get the things we need." In this ntence。"how" XXX"The scissors are not what I need." In this ntence。"what" acts as the object of the predicate clau.
That is the reason why she failed to pass the exam。(同义句) 那就是她考试不及格的原因。(2)“That is why。”与“That is becau。”意思相近，但语法结构不同，“That is becau。”中becau引导的是原因状语从句，例如：That is becau she didn't study hard XXX。那是因为她没有好好研究。
努力工作的英文
This is the reason why I cannot agree.
allegiance
XXX XXX "becau" in the ntence pattern "That is becau。" XXX。meaning "This is why。/Becau。"。The difference een "That is becau。" and "That is why。" is that "That is becau。" indicates a reason or a cau。while "That is why。" indicates a XXX:
He did not e the film last night。That is becau he had to help his little sister with her homework。(The first ntence indicates the conquence。and the cond XXX.)
He had en the film before。That is why he did not e it last night。(The first ntence indicates the reason。and the cond XXX.)
trading placesXXX object claus
