2023届高三英语二轮复习：表语从句课件（12张PPT）

(共12张PPT)
表语从句
表语
定义：表语用来描述主语是什么，包括主语的身份、特征和状态等
用法：系动词之后接表语
结构：主语+系动词+表语
Eg.: Angle is a teacher.
Angle is kind. （形容性描述）
系动词：也称“连系动词”，是把主语和表语连系在一起的一类动词
系动词ll 状态系动词 表主语状态 be
感官系动词 表人的感官动作 feel, smell, sound, taste, look
表象系动词 表看起来像 seem, appear, look
变化系动词 表主语变成什么样 become, grow, get, go, come, turn, fall, make, run
持续性动词 表主语继续做或保持一种状态 keep, remain, stay, rest, lie, stand, hold, continue
终止性动词 表终止、完成 prove, turn out
系动词注意事项：
1. 其他所有系动词替换成be动词，句子意思会发生席位变化，但是其核心意思不变；
The food tastes delicious.
The food is delicious.
2. 某些系动词同时又可做实义动词
We should keep quiet.(keep 为系动词）
I kept three dogs in my chilhood.（keep为实义动词）
表语从句
定义：在复合句中，作表语的从句就是表语从句；表语从句的功能与表语一样，用来描述主语的身份、特征和状态等；
结构：主语+系动词+引导词+简单句
Eg.: This book is what I want.
1. that 仅起连接作用，没有实际意义，不作句子成分。后接“确定的事儿”
The truth is that I didn’t finish my essay.
that 注意事项：
（1）表语从句中that一般不能省略，但当主句中含动词do 的某种形式时，that 可以省略
What I want to to do is (that) I can hug him.
（2）当句子的主语是表愿望、要求、命令、建议等名词时，表语从句要用虚拟语气（should+do)should可省略
建议：suggestion, advice
愿望：desire
计划：plan
要求：request, requirement, demand
The doctor’s advice is that he go outside.
2. whether 译为“是否”，表语从句不用“if”
The question is whether they will support me.
3. as if/as though “好像”
（1）引导的表语从句内容是事实或可能是事实，用陈述语气；
It seems as if it going to snow.
（2）引导的表语从句内容并非事实，用虚拟语气；
虚拟时间（从句动作发生 的时间） 从句谓语动词
对现在的虚拟（与主句动作同时发生） 过去式(be 用were)
对过去的虚拟（发生于主句动作之前） had done
对将来的虚拟（发生在主句动作之后） would/could do
She looks as if she were an angel. （同时发生）
His hair seems as if it had been burnt. （发生在主句动作之前）
He opened his mouth as if he would say something. （发生在主句动作之后）
4. 连接代词：who/whom/whose/what/which/whatever/whoever/whichever
The problem is who can do the work.
I know whom he loves.
The problem is whose cat is the most cute.
The question is which answer is right.
That’s what he is worrying about.
What he wants to get is whatever you have.
You can be whoever you want to be.
You can pick whichever one you like.
that 和 what 辨析
that 引导表语从句时仅起连接作用，没有实际意义，不充当句子的成分；
what引导表语从句时，既充当连接代词，又作句子成分；
Our plan is that we will leave here tomorrow.
That’s what he wants.
5. 连接副词：when/where/why/how,分别在表语从句中作时间、地点、原因、方式状语；
That was when I was 15.
Beijing is where he wants to go.
That’s why he didn’t come.
The problem is how we can find him.
注意：主语为名词reason，表语从句用that而不用why引导表语从句；
The reason for such a serious accident is that the driver was too drunk.
6. because 名词性从句中只有表语从句有because；
That’s because I love you.
Tips:
(1) This is why+结果 “那就是...的原因”
That is why we don’t trust him.
(2) That is because +原因 “那是因为...”
That is because he often lies.
(3) The reason why ... is that... “...的原因是...”
The reason why we don’t trust him is that he often lies.
1. The reason why he failed is ____ he was too careless.
A. because B. that C. for D. because of
2. Go and get your coat. It’s _______ you left it.
A. where B. there C. there where D. where there
3. The problem is _______ to take the place of Ted.
A. who can we get B. what we can get
C. who we can get D. that we can get
4. What I want to know is _____ he likes the gift given by us.
A. that B. if C. whether D. 不填
5. The reason is ______ I missed the bus.
A. that B. when C. why D. what
6. That is ________ we were late last time.
A. that B. when C. why D. what
7. She looked _____ she were ten years younger.
A. that B. like C. as D. as though
8. -I fell sick!
-I think it is ______ you are doing too much.
A. why B. when C. what D. because
9. The reason why he hasn’t come is ________.
A. because his mother is ill B. because of his mother’s being ill
C. that his mother is ill D. for his mother is ill
Thanks!