牛津译林版八年级上册Unit 6 Bird watching Period 4 Grammar课件(共20张PPT)

(共20张PPT)
Unit 6 Birdwatching
Grammar
Get to know the usage of the“to”-infinitives as the adverbial and the object complement
Learn how to use “to”-infinitives correctly.
Use “to”-infinitives as the adverbial and the object complement in the real situation.
.2.
Learning Objectives
Revision
Zhalong Nature Reserve
Why do people build Zhalong Nature Reserve
People build Zhalong Nature Reserve ________________.
to protect wildlife
Why do many tourists go to Zhalong every year
Every year many tourists go to Zhalong ________________
to watch birds
Why do the members of the Birdwatching Society go to Zhalong
The members of the Birdwatching Society go there ____________________
to study the birds.
Presentation
Using to-infinitives for purpose
1.We can use to-infinitives to express purpose. (表目的)
2.We can also use in order to to express purposes. This is more formal than to-infinitives. (表达更正式，更清楚)
Practice
Using: to-infinitives for purpose
e.g: The boy plays football every day to keep fit.
The baby drinks milk to grow better.
They study hard to find a good job.
People build Zhalong Nature Reserve to protect wildlife.
同义句转换
People build Zhalong Nature Reserve in order to protect wildlife.
= In order to protect wildlife , people build Zhalong Nature Reserve.
in order to 也可以用于表达目的
In order to 可放于句首或句末，放句首引导目的状语时要用逗号与主句隔开
Presentation
Using: to-infinitives for purpose
1.The members of the Birdwatching Society go there to study the birds.
=The members of the Birdwatching Society go there in order to study the birds.
= In order to study the birds, the members of the Birdwatching Society go there.
2.Every year many tourists go to Zhalong to watch birds.
=Every year many tourists go to Zhalong in order to watch birds.
=In order to watch birds, every year many tourists go to Zhalong.
1 People go to Zhalong __ a to take photos of the birds.
2 They should read about __ b to study the birds in the
the birds first wetlands.
3 Most People take a __ c to watch the
camera birds.
4 The Birdwtching __ d to learn more about them.
Society goes
a
d
b
c
Write the correct letters in the blanks.
动词不定式作目的状语
1
We are now inviting them to help us
We need more people to count and describe the birds.
Verb + sb.+ to do
Subject(主语）
Object(宾语）
Object Complement
(宾语补足语）
Revision
Zhalong Nature Reserve
Presentation
Using: verbs +objects+to-infinitives
1.We can use some verbs with objects and to-infinitives. (动词不定式在句中作宾语补足语)
2.We add not before to-infinitives to express a negative meaning
Presentation
Using: verbs +objects+to-infinitives
List some verbs with the structure “Verb + sb.+ to do ”
ask sb to do sth.
tell sb to do sth.
advise sb to do sth.
invite sb to do sth.
want sb to do sth.
=would like sb to do sth.
need sb to do sth.
teach sb to do sth.
wish sb to do sth.
encourage (鼓励）sb to do sth.
warn(警告）sb to do sth.
动词help后面的动词不定式可带to,
也可不带to。
e.g. This will help people (to) understand
the importance of the wetlands.
She often helps me (to) do the housework.
Presentation
不定式 to do和do,
多数 to do 少数 do,
下列动词省去 to ,
“一感” “二听” “三让/使” “四看”
let, make, have
feel
hear, listen to
watch, see, notice, look at
Use some verbs +objects+infinitives
without to:
Presentation
1.Mr Wu _____ us _______ a pair of comfortable shoes because we would have to walk a long way. (ask/wear)
2. We ______ some birds ____ in the trees. (hear/sing)
3. Mr Wu ____ us _______ the birds carefully. (tell/watch)
4. He also _______ us _________ the birds. (want /describe)
B
Complete the sentences with the correct forms of the verbs
asked to wear
heard sing
told to watch
wanted to describe
5. He _______ us ___________ in the wetlands.
(advise/not shout)
6. The cold weather _______ some birds ______ south for the winter. (make/fly)
7. The trip _______ us __________ more about wildlife. (help/learn)
made
helped (to) help
fly
advised not to shout
Summary
1. Use to-infinitives for purpose. (用动词不定式表目的）
to = in order to
2. Verb + object + to-infinitive (动词+宾语+动词不定式）
a. ask, (tell, want …) + sb + (not) to + do + sth
b. let, (make, have …) + sb + do + sth
c. help + sb + (to) + do + sth
1. (中考 丹东)—You never miss one minute in class.
—You know, we must listen to the teacher carefully ______.
A. take notes B. taking notes
C. to take notes D. takes notes
C
Exercise
2. ________ late, my parents always tell me to go to bed early.
A. In order to not get up B. In order to get up
C. In order not to get up D. So as to not to get up
C
3. I'll try ________ the same mistake again.
A. to not make B. not make
C. not to make D. make
C
4. (中考 临沂)Doctors in the town are using the books ____ their studies and treat patients.
A. continue B. to continue C. continuing D. continues
B
GOOD JOB