2022届高三英语二轮复习条件和方式状语从句课件(23张PPT)

(共23张PPT)
条件和方式状语从句
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if句型转换（分词作条件状语）
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条件状语从句的引导词
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as though/if 引导方式状语（虚拟语气）
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目
录
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If 真实条件句（陈述语气）
If you read the book, you will be interested in it.
a. 时态
主句一般将来时，从句一般现在时(主将从现)
If the museum charges for entry, a lot of people won’t be able to visit it.
（ ）If your dog is depressed, he probably ____ more exercises.
A. will need B. needed C. need D. needs
非真实条件句（见“虚拟语气”）
If I were you, I would take his advice.
.
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b. 句型（拔高知识点）
If you work harder, you will succeed.
Work harder, and you will succeed.
Work harder, or you won’t succeed.
Working harder, you will succeed.
可与if条件状语从句进行转换的句型：
1. 祈使句/名词短语，and/or+简单句
2. 分词，主句（分词做条件状语）
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（ ）Start out right away, _____you’ll miss the first train.
and B. but C. or D. while
（ ） _____, and I’ll get the work finished.
Have one more hour
B. One more hour
C. Given one more hour
D. If I have one more hour
C
B
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If you give me somewhere to stand, I will move the earth.
Give me somewhere to stand, and I will move the earth.
Give me somewhere to stand, or I won’t move the earth.
Given somewhere to stand, I will move the earth.
（ ）句型转换
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d. if only vs. only if
if only 但愿，要是……就好了
表示一个不可能实现愿望，要用虚拟语气。
only if 只有
等于only on condition that，从句用陈述语气。
Only if you heat ice does it turn to water.
If only I knew!
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（ ）_____we take steps to deal with this problem can we avoid a severe water shortage later on.
If only B. As long as
C. When only D. Only if
If we take steps to deal with this problem,
we can avoid a severe water shortage later on.
Only放在句首，句子要用部分倒装。
Only if we take steps to deal with this problem
can we avoid a severe water shortage later on.
.
D
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unless=if … not… 如果不，除非
unless能作为介词使用，相当于except。
Nothing will come out of it unless disaster.
这种事除了引起灾祸之外不会有什么结果。
in case 多置于句首，等于if it happens that。
In case I forget, please remind me of my promise.
如果我忘了，请提醒我所做的承诺。（只有我忘了的情况下才提醒我。）
so/as long as , on condition that表示只要，条件是……
As/So long as we don't lose heart, we'll find a way to overcome the difficulty.
You may use the room on condition that/ so long as you clean it afterwards.
“万一，如果”
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1. （ ） __C____ we have enough evidence, we can't win the case.
A. Once B As long as C. Unless D Since
2. （ ）You won't find paper cutting difficulty __B____ you keep practicing it.
A. even if B. as long as C. as if D. ever since
语法填空题
3. （ ）It is so cold that you can't go outside __unless______you are fully covered in thick clothes.
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Providing/provided (that), supposing/suppose (that), given (that)
如果，只要，假如
Given that they are inexperienced, they've done a good job.
考虑到他们缺乏经验，他们的工作已做得很好了。
Provided/Providing (that) we invite him, he would surely come to dinner.
假如我们邀请他的话，他肯定会来吃饭的。
Suppose/Supposing we can't get enough food, what shall we do
假设我们弄不到足够的食物，那我们怎幺办？（仅用于疑问句）
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判断句子逻辑关系为条件
条件状语从句的引导词：
1空：if , unless
2空：in case, providing/provided (that), supposing/suppose (that), given (that)
3空：so long as, as long as, on condition that
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（ ）After only six months he was due for a raise ____ this assessment was satisfactory.
（ ）You can fit self care into your weekly routine ____ ____ ____ you prioritize(优先考虑).
( ）He did so just to give her those extra few precious moments of life, ___ ___ I was careless enough to step on her.
if
in case
as/so long as
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方式状语从句常见从属连词：as（依照……，像……一样），as if（正如……，似乎……），as though（似乎……，好像……），（just）as... so...（正如……）引导，多置于主句之后。
( )1. You must do ______ I told you.
A. after B. before C. where D. as (D)
( ) 2. The students must do ______ the teacher told them.
A. as B. before C. after D. if (A)
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as if，as though ＂仿佛……似的＂，＂好像……似的＂，表示与事实相反（虚拟语气）。
试比较：
He talks as if he is drunk． 从他谈话的样子来看他是醉了
He walks as if he were drunk.
第一句表示“他已经醉了”，第2句则表示“他没有醉”。又如：
It looks as if it is going to rain.
It looks as if it were going to rain.
第一例意味着快要下雨了，第二例则意味着不会下雨。
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as if 从句用虚拟语气的情况。
（1）如果从句表示与现在事实相反，谓语动词用一般过去时。（动词be用were,也可用was）如：
You look as if you didn’t care．
你看上去好像并不在乎。
He talks as if he knew where she was．
他说话的样子，好像他知道她在哪里似的。
（2）从句表示与过去事实相反，谓语动词用“had＋过去分词”。如：
He talks about Rome as if he had been there before．
他说起罗马来好像他以前去过罗马似的。
The girl listened as if she had been turned to stone．
那女孩倾听着，一动也不动，像已经变成了石头似的。
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1. ( ) You understand not only what the rule says but what it means, as if yourself__D___it.
A. make B. made C. have made D. had made
2. ( ) He talks as if he__C_____ all about the thing.
A. knows B. has known C. knew D knowing
3.( ) —Do you remember the experiment we did together many years ago
—Yes, _____A_______ we did it yesterday.
A. as if B. even if C. only if D. if only
小结
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as if/though从句的时态：
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1、（ ）He looked at me curiously _______________ he had some doubt which he was unwilling to express.
A.as if B.in case C.unless D.so that
2. （ ）More people will eat out in restaurants _______________ they do today.
A. than B. when C. while D. as
3. （ ) The two boys had so much in common as if they____________ brought up in the same family.
A. should be B. would be C. have been D. had been
小结
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1. 祈使句/名词短语，and/or+简单句
2. 分词，主句（分词做条件状语）
if句型
1空：if , unless 2空：in case, providing/provided (that), supposing/suppose (that), given (that)
3空：so long as, as long as, on condition that
现
条件状语从句引导词
虚拟语气
as if/though
作业
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1. ( ) This medicine is quite beneficial to your recovery after the operation,______ you take it as told.
A. unless B. providing C. considering D. since
2. ( ) I'll be out for some time. ______ anything important happens, call me up immediately.
A. In case B. As if C. Even though D. Now that
3. ( )She says that she'll have to close the shop ________ business improves.
A. if B. unless C. after D. when
4.( )The house was greatly damaged by the truck. We’d better leave things __________ they are until the police arrive.
A. since B. as C. thoug D. unless
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5. ( )I'll be out for some time. ______ anything important
happens, call me up immediately.
A. In case B. As if C. Even though D. Now that
6. ( )_______ you start eating in a healthier way, weight control will become much easier.
A. unless B. Although C. Before D. Once
7. ( ) He looked as if he _____ ill for a long time.
A. was B. were C. has been D. had been
8. ( ) He always talks _______ he had been toouter space.
A．like B．as if /though C．because of D．as
9. ( )翻译句子
He talks as if/though he knew all about it．
_______________________
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10. ( )
Have an aim in your life, or your energies will be
wasted.
If you have an aim in your life, your energies won’t be wasted.
If you don’t have an aim in your life, your energies will be wasted.