资源简介

(共21张PPT)
Unit 5
Wild animals
Grammar
01
02
学习目标
能掌握动词不定式作宾语、目的状语和宾语补足语的用法。
能掌握动词不定式的基本形式特征、表达的意义。
Lead in
We often use to-infinitives after these verbs: ____________,
___________, ___________, ___________, ___________, learn, plan, prepare, choose, fail, remember, forget, agree, etc.
The Class 1, Grade 8 students went on a school trip to Beijing Zoo yesterday. Simon wrote about a giant panda. Read his article and pay attention to the use of to-infinitives.
start
begin
try
decide
want
A Using verbs + to-infinitives
When we arrived at the zoo, the pandas started to come out of their home. I liked one of the pandas most. That panda was full of energy. He began to eat bamboo for breakfast. After that, he tried to exercise. A few minutes later, he decided to climb a tree. He even wanted to climb over the wall!
Read and summarise
新课讲授
动词不定式
当句子中已经有谓语动词，而我们又要表达不止一个动作概念时，其余的动词可以使用非谓语形式。动词不定式是动词的一种非谓语形式，其基本形式是“to+动词原形”。
e.g. He wants to play football after class. 他想课后踢足球。
动词不定式在句子中不充当谓语，因此没有人称、数的变化，可在句中充当多种成分，如主语、宾语、宾语补足语、状语等。
e.g. To learn English well is not easy. 学好英语不容易。
What are you trying to do 你想干什么？
The teacher asked us to read more English stories.
老师让我们多读英语故事。
They got up early to catch the early bus. 他们早起去赶早班车。
动词不定式做宾语
动词不定式在句中常充当谓语动词的宾语，这一类谓语动词常见的有：afford、agree、choose、decide、forget、hope、learn、manage、plan、prepare、promise、refuse、try、want。
e.g. I decided to visit my grandparents this weekend.
我决定这个周末去看望祖父母。
注意：动词不定式的否定形式是“not to+动词原形”。
e.g. You must promise not to do this again. 你必须保证不再这么做了。
1. My mother asked me _________ (wash) the dishes after dinner.
2. He hopes _________ (visit) his grandparents next weekend.
3. Which sentence is correct （ ）
A. I plan learn English well.
B. I plan to learn English well.
C. I plan learning English well.
to wash
to visit
B
Practice
This panda is fat and quiet. She (1) ______________ (like, eat) apples. She does not (2) ______________ (want, move) around. Sometimes she (3) _______________ (manage, climb) up the tree, but she often (4) ______________ (fail, get) down.
likes to eat
want to move
manages to climb
fails to get
Millie watched a video about another giant panda at the zoo and then wrote about plete her article with the help of the words in brackets.
Read the text below by a panda keeper and pay attention to the use of to-infinitives.
We love the baby panda very much. We prepare all kinds of food to give her a healthy diet. We buy toys to make her happy. We also plan to give her a special cake and some gifts to celebrate her birthday.
We often use to-infinitives to express purpose. We can also use in order to, especially in formal writing.
We prepare all kinds of food to give her a birthday diet.
We prepare all kinds of food in order to give her a birthday diet.
B Using to-infinitives to express purpose
Read and summarise
动词不定式做目的状语
我们还可以用动词不定式表示某一动作或状态的目的。
e.g. We will move faster to build China into a country strong in sports.
我们要加快将中国建设成为体育强国。
He stayed at the school to clean the classroom. 他留在学校打扫教室。
为了使表达更加清楚或对目的加以强调，还可用 in order to。
e.g. She is running quickly in order to catch the first bus.
为了赶上首班公交车，她正飞快地跑着。
I will sit in the front in order to hear more clearly.
为了听得更清楚，我要坐在前面。
注意：由in order to引导的目的状语，既可以置于句尾，也可以置于句首。
e.g. They left early in order to get there in time.
为了及时赶到那里，他们很早就出发了。
= In order to get there in time, they left early.
1. He saved money every month ________ (buy) a new basketball.
2. We turned on the light ________ (see) the words on the blackboard clearly.
3. —Why did Tom go to the supermarket yesterday
—He went to the supermarket ________ ________ some milk.
4. Which sentence uses the infinitive as an adverbial of purpose (目的状语) （ ）
A. I want to read this storybook.
B. She has a pen to write with.
C. They ran fast to catch the early train.
to buy
to see
to buy
C
Practice
1. Eagles use their eyes a. in order to stay safe.
2. Whales make loud sounds b. to feed their babies and themselves.
3. Tigers hunt other animals c. in order to talk to each other.
4. Zebras live in groups d. to learn hunting skills.
5. Baby animals watch their parents e. to find small animals on the ground.
Amy is thinking about wild animals after coming back from the zoo. Match the first part of each sentence on the left with the second part on the right.
Daniel wrote about the school trip to the zoo. Read his article and pay attention to the use of infinitives with or without to and answer the following questions.
Today we went to the zoo. The pandas in the zoo are really cute, and they made us all laugh. I saw a baby lion stay near its mother for protection. How lovely! Mr Wu asked us not to feed the animals there because it might make them sick. This trip was meaningful. It helped us (to) understand the importance of protecting animals.
C Using verbs + objects + infinitives with/without to
Read and summarise
We can use some verbs with objects and infinitives.
We can use the verbs ______________, let, ______________
and hear in this structure without to.
We can use the verb ______________ with or without to.
We add ______________ before to-infinitives to express a negative meaning.
make
see
help
not
TIP
We often use the following verbs with objects and to-infinitives:
tell invite teach advise order warn encourage
动词不定式做宾语补足语
我们可以用动词不定式来说明宾语的情况，此时动词不定式在句中充当宾语补足语。
e.g. I want you to sing a song for us. 我想让你给我们唱首歌。
My father asked me to clean my room.
我爸爸让我打扫一下我的房间。
部分动词, 如ask、tell、order、invite、get、allow、wish、want、encourage、advise、warn、like、love、hate等，常跟带to的动词不定式做宾语补足语。
e.g. What did your parents advise you to do 你父母建议你怎么做？
The policeman told the boys not to swim in the river.
警察告诉男孩们别在河里游泳。
感官动词，如hear、feel、see、watch、notice等，以及使役动词let、make和have，常跟不带to的动词不定式。此时不带to的动词不定式做宾语补足语。
e.g. I saw her open the door. 我看见她打开门。
You can let the boy go first. 你可以让那个男孩先走。
动词help后面的动词不定式可带to，也可不带to。
e.g. She often helps me (to) do the housework. 她常常帮我做家务。
We helped him (to) fix his bike. 我们帮他修自行车。
1. My teacher often tells us _________ (be) quiet in class.
2. Tom’s parents asked him ____________ ( play) computer games for too long.
3. We all want our team _________ (win) the school basketball match.
4. The boss told his worker _________ (finish) the work before 5 o’clock.
5. Which sentence uses the infinitive as an object complement (宾语补足语) （ ）
A. I hope to visit Beijing next year.
B. Mom wants me to help her with cooking.
C. He has no time to watch the movie.
to be
not to play
to win
to finish
B
Practice
Mr Wu (1) ____________ us ____________ (tell, wear) a pair of
comfortable shoes.
Our Chinese teacher (2) ____________ us ____________ (ask, watch)
the animals carefully because she (3) ____________ us ____________
(want, write) about them.
We (4) ____________ some birds ____________ (hear, sing) in the trees.
The trip (5) ____________ us ____________ (help, learn) more about
animals.
told
to wear
asked
to watch
wanted
to write
heard
sing
helped
(to) learn
Kitty is also writing about the trip to the plete her notes with the help of the words in brackets.
Write about one of your trips to the zoo using to-infinitives.
Complete the following sentences with the correct forms of the verbs in
brackets.
(1) They save money every month ________ (buy) a new house in the future.
(2) She hopes __________ (win) the competition next week.
(3) The doctor advised him ____________ (not smoke) any more for his
health.
(4) We watched the children __________ (play) football in the playground.
(5) They agree __________ (attend) the important meeting tomorrow.
(6) He took a part-time job __________ (earn) some extra money for his
hobbies.
to buy
to win
not to smoke
play
to attend
to earn
当堂检测
Review the grammar we’ve learnt today.
Preview Word power on page 72.
Homework

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