Unit 3 Fascinating parks Discovering 课件(共18张PPT)-人教版(2019)选择性必修第一册

(共18张PPT)
动词-ing形式（一）
V-ing作主语
Smoking, Parking, Spitting, Littering…
Have you ever seen these signs
-ing forms
Step 1:Lead in
1. Her hobby is collecting stamps.
2. He found her a charming girl.
3. Checking my watch,I see it’s 7:30am.
4. She enjoys drawing.
5. I saw him entering the hall just now.
What are the functions of the –ing form in the sentences
作表语
作定语
作状语
作宾语
作宾语补足语
1.________________ is their hobby.
Playing basketball
一. 动名词作主语
Observe and translate
2.__________________ is the best way to lose weight.
Doing/Taking exercise
3.________ and _______________ are her hobbies.
Painting
collecting stamps
（一）动词-ing作主语
1. 动名词做主语，表示抽象的、经常的以及习惯性的动作或状态。单个动名词（短语）做主语时,谓语动词使用________形式。但是意义不同的两个动名词（短语）并列作主语时,谓语动词要用_________形式。

examples:
1. Playing basketball is their hobby.
2. Doing exercise is the best way to lose weight.
3. Painting and collecting stamps are her hobbies.
单数
复数
____ ____ no use _________(attempt) to escape.
______________ (attempt) to escape is no use.
Attempting
It is
eg：
Translate and transform
attempting
_______ (see) the film named Frozen is worthwhile.
___ ____worthwhile _________(see) the film named Frozen .
Seeing
It
is
Translate and transform
seeing
_________(play) computer games is a waste of time.
It is a waste of time playing computer games.
Playing
It is no use attempting to escape.
It is worthwhile seeing the film named Frozen.
It is a waste of time playing computer games .
2：动名词做主语时，有时用_____作形式主语，把真正的主语（动名词短语）移置_______。
What’s in common
it
句尾
It is no use/no good doing sth 做……是没有用处/好处的
It is a waste of time doing 做……是浪费时间的
It is useless doing… 做……是无用的
It is worthwhile doing 做……是值得的
Read and Memorize
practice
________(talk) with your friend heart to heart is pleasant.
It’s no good ____________(regret) your past mistakes.
Climbing mountains ______(be) really difficult for the old.
________________(invite)to speak here is a great honor for me.
__________________(laugh) at in public cast a shadow on the boy’s whole life.
Talking
is
regretting
Being invited
Being laughed
动名词被动式：being done
否定式：not doing
Their ____________(come) to help was a great encouragement to us.
他们过来帮忙(这件事)对我们来说是莫大的鼓舞。
动名词的复合结构做主语
comimg
当动名词有自己的逻辑主语时，常可以在前面加上一个名词或代词的所有格，构成动名词的复合结构。
My son’s ____________(fail) to pass the college entrance examination made our whole family unhappy.
His ______________(not know) how to help the people trapped in the snowstorm made him worried.
failing
not knowing
动词-ing形式和不定式作主语时的区别
________ is my hobby, and ________ at my friend’s party is my dream. (sing)
Singing
to sing
3：动名词和to do都可以作主语。
_________作主语表示比较抽象的、经常性行为，__________作主语往往表示具体的或一次性的动作,特别是将来的行为。
动名词
不定式
1._____________(learn) a language requires time and effort.
2. It is not always easy ____________(refuse) invitations.
3.____________(save) money now seems impossible.
4. To answer correctly is more important than___________(finish) quickly.
5. It is no good _________(smoke).You should give it up.
6. It _________(take) forty-five minutes __________ (get)there by bus.
Learning
Quiz
to refuse
To save
to finish
smoking
takes
to get
practice
_________(grow) flowers is my hobby.
__________（win）the prize is a great honor for China’s science and traditional Chinese medicine.
It’s a great pleasure _____________(wander) along the beach when the moon is hanging high.
_________(take) a walk after supper this evening is a good idea.
(2019天津) ___________(learn) to think critically is an important skill today's children will need for the future.
（2019 浙江） ______________(not give) enough praise can be just as damaging as giving too much.
Winning
wandering
To take
Learning
抽象的动作
一次性的动作
抽象的动作
Not giving
抽象的动作
Growing
经常性行为
Thank You !