Unit 1 Art Discover Useful Structures 课件(共15张PPT)人教版(2020)选择性必修第三册

(共15张PPT)
Discovering useful structures
不定式
关于动词的那些事（思维导图）
动词
谓语动词
（作谓语）
非谓语动词
（作主宾表
定状补）
to do
doing
done
do/ does/ did
【P5 activity 1】Read these sentences and fill in the blanks using the correct words from the text on pages 2 and 3.
Perhaps the best _____ to understand Western art is to look at the development of Western painting over the centuries.
During the Middle Ages, the _______ of Western art was to teach people about Christianity.
In this work, Monet’s ____ was to convey the light and movement in the scene ...
___________________________ was no longer show reality, but instead to ask the question, “What is art ”
way
purpose
aim
What they attempted to do
动词不定式 在句中作表语
1. 结构
动词不定式可以放在 be和 become, sound, taste 等__________后
面作表语，由“to +动词原形”构成，
说明或解释主语的内容，也可表示将来的动作。
2. 基本用法
Perhaps _______________________________________________ the development of Western painting over the centuries.
也许，了解西方艺术的最好方法就是回顾若干个世纪以来西方
绘画的发展。
____________________________ your father for his opinion.
我的建议是问问你父亲的意见。
系动词
the best way to understand Western art is to look at
What I would suggest is to ask
Observe and Discover
动词不定式
(主动) to do
(被动）to be done
动词不定式作表语
Tip 1：主语是以 __________________________________________ _____________________________________________________________________________________等表示意向、打算、计划的抽象名词为中心的名词词组时，或者以_____________________表示时，一般用动词不定式作表语说明主语的内容。
problem, reason, risk, task, wish, aim, suggestion, duty, hope, idea, intention, purpose, way
动词不定式
difficulty, experience, job, method, principle
what引导的名词性从句
His dream is ____________(become) an astronaut.
What I will do next is _______(get) enough money to buy a car.
to become
to get
动词不定式作表语
Tip 1：主语是以 __________________________________________ _____________________________________________________________________________________等表示意向、打算、计划的抽象名词为中心的名词词组时，或者以_____________________表示时，一般用动词不定式作表语说明主语的内容。
problem, reason, risk, task, wish, aim, suggestion, duty, hope, idea, intention, purpose, way
动词不定式
difficulty, experience, job, method, principle
what引导的名词性从句
有时，根据表达的需要，在作表语的不定式前，还可添加疑问代词或疑问副词，包括 what, who, how, when, where 等。
例如：问题是如何开始。
The problem was how to begin.
Tip 2：
某些动词不定式(短语)作表语时，需用主动形式表示__________。
3.Who is _____________ the fire
谁应为这场大火承担责任？
4.The house is _________(let). 此房出租。
to blame for
to let
被动意义
动词不定式
Tip 3：当主语包含定语从句且其先行词为代词_____或者主语被___________________或形容词________修饰时，其后可接“系动词+不定式”作句子的表语。
5. All he wanted was ____________(leave) alone.
他只想一个人待着。
6. The least I can do to help is ___________(lend) her a car.
我所能帮的最起码的事是借给她一辆车。
to be left
to lend
all
only, first, one, least
最高级
动词不定式
Tip 4：
当表语表示“___________________________________________”等时,可用动词不定式作表语。
7. You must be patient and persistent if you are ___________(success).
如果你想成功，你必须有耐心和恒心。(愿望)
8. You are _________(have) a face-to-face talk with them. (劝告)
你必须得和他们进行一次面对面的谈话。
to succeed
to have
同意、安排、命令、决定、劝告、愿望、禁止
动词不定式
Tip 5：
动词不定式作表语可用于被动语态，相当于 _____________
______________________，具有情态意义。
9. The regulations are __________________. = The regulations must be observed.
10. You are _______________. = You should be rewarded.
to be observed
to be rewarded
can / could,
动词不定式
should, ought to, must
be to be done= can/could/should be done.
Practice in P11 in exercise book.
动词不定式和v-ing作表语时，要注意与句子的主语在形式上保持一致， 即若句子的主语为v-ing，则表语也应使用v-ing；若主语为动词不定式，则表语也应使用动词不定式。
To see is to believe. = Seeing is believing.
动词不定式作表语和v-ing作表语的区别
动词不定式和v-ing作表语时可换用，但以下情况除外:
当动词所表达的是某一特定的行为，尤其是将来的行为时，通常用动词不定式作表语。
Her best wish is to put her new ideas into practice.
若动词所表达的是一般性抽象的经常发生的动作，则通常用v-ing作表语。
My favorite sport is swimming.
What I hate most is being laughed at.
动词不定式作表语省略to的情况
Observe and Discover
3. 晚上他做过的唯一的事是读报纸。
All we need to do is live each day with hope.
What they attempted to do was draw public attention.
In the evening the only thing he did was read the newspaper.
动词不定式(短语)作表语时，一般情况下不定式符号to不能省略，但当主句主语部分含有实义动词do的某种形式时，可省略不定式符号to:
1. 我们需要做的就是怀有希望过好每一天。
________________________________________________________________________________
2. 他们试图做的是引起公众关注。
________________________________________________________________________________
_________________________________________________________________________________
This year, his plan is _______ (make) some changes in the teaching method.
What I suggest is _______ (start) work at once.
One of her hobbies is _________ (collect) stamps.
I think it is your brother who is _______ (blame) for the accident.
The students trust her very much; as a result, her advice is __________ (influence) their decisions.
to make
to start
collecting
to blame
即学即练
Practice and Apply
to influence
Finish all the activities in “Using Structures ” in the workbook in .
THANK YOU