(共35张PPT)
Unit 2 Plant A Plant!
Grammar
Building Your Vocabulary
ACROSS
1. This project is challenging, but it’s good for everyone. If you have time, you should c________ it.
5. You should never judge a book by its
c________, but should you judge a story by
its title
6. The stone is brown and round. It has a h________ in the centre.
Complete the clues and do the crossword.
3
2 4
1 s d
7
5
6
onsider
over
ole
3
2 4
1 s d
7
5
6
DOWN
2. The e________ sky turned pink as the sun rose.
3. A g________ is a place outside. You grow
plants in it.
4. She was supposed to be on a trip. So
when I saw her here, I was s________.
7. They have learned English in school.
M____ of them understand English well.
ost
urprised
astern
arden
Complete the clues and do the crossword.
Grammar in Use
Fill in the blanks with the correct forms of the given words.
Ⅰ
1. We had a __________(please) journey to England this summer.
2. It is __________(amaze)that this tree laughs when the wind
blows.
3. The children are drawing with their __________(colour) markers.
pleasant
colourful
amazing
Fill in the blanks with the correct forms of the given words.
Ⅰ
4. Be __________(care)with your handwriting.
5. After the earthquake，they became __________(home) people.
6. They are __________(happy) about the bad news.
homeless
careful
unhappy
Write out the words according to the requirements.
Ⅱ
1. hope ________(adj.) 2. water ________(v.)
3. useful ________(adv.) 4. dirt ________(adj.)
5. warm ________(v.) 6. book ________(v.)
7. sun ________(adj.) 8. danger ________(adj.)
9. cover ________(v.) 10. lazy ________(adv.)
hopeful
water
usefully
warm
sunny
cover
dirty
book
dangerous
lazily
【探究】
构词法就是利用词形变化的规律来构成词汇的方法。英语构词法主要有三种：合成法、派生法和转化法。本单元我们来了解和掌握派生法和转化法这两种构词法。
派生法
在一个单词（词根）前或后加上一个词缀，构成一个新词，这种构词法称为派生法。词缀分为前缀和后缀。加在单词前的词缀，叫前缀；加在单词后的词缀；叫后缀。
前缀
1. 一般情况下，加前缀不改变词性，只改变原词的词义。
dis-表示“否定，相反，除去”（加在动词前，表示否定含义）。
例如：appear出现→disappear消失
im-表示“不，非”（加在形容词或副词前，表示否定含义）。
例如：possible可能的→impossible不可能的
前缀
2. 特殊情况下，加前缀改变词性和词义。
a-表示“向里，离开，加强”（加在动词或名词前构成形容词或副词）。
例如：sleep (n.&v.)睡觉→asleep (adj.)睡着的
后缀
加后缀构成的派生词与原词的词义有联系，有些会改变词性。
1. -ed, -d表示“……的”（加在动词后构成形容词；加在规则动词后构成过去式和过去分词）。
例如：
interest使感兴趣→interested感兴趣的
excite使兴奋，使激动→excited兴奋的，激动的
后缀
2. -er, -or, -n, -ese, -ian表示动作的执行者（加在动词后构成名词）、具有某国国籍的人或“从事……的人”（加在名词后,词性不变）。
例如：
run跑→runner奔跑者；visit访问→visitor访问者；
America美国→American美国人；Japan日本→Japanese日本人；music音乐→musician音乐家
后缀
3. -ful表示“充满……的”（加在动词或名词后,构成形容词）。
例如：care小心→careful小心的
4. -tion加在动词后，构成名词。
例如：invent发明→invention发明
注意：通过加前缀或后缀派生而成的新词从词性的变化来看，主要有以下几种情况：
(1)动词(Verb)→名词(Noun)
wait等候→waitress女服务员
build建造→building建筑物
write写→writer作家
(2)名词(Noun)→形容词(Adjective)
cloud云→cloudy多云的
snow雪→snowy下雪的
sun太阳→sunny阳光明媚的
fog雾→foggy多雾的
(3)形容词(Adjective)→副词(Adverb)
slow慢的→slowly缓慢地
happy快乐的→happily快乐地
注意：有些形容词本身也是以-ly结尾的：
friendly友好的 lonely孤独的 lovely 可爱的
转化法
英语中，有的名词可用作动词，有的形容词可用作副词或动词。这种不改变词形，而由一种词性转化为另一种词性的构词方法叫作转化法。
动词转化为名词
1. 动词转化为名词时，意思没有变化：
Eg: Let’s go out for a walk.
2. 动词转化为名词时，意思有一定变化：
Eg: He is a man of strong build.
3. 动词转化为名词时，与一个动词和不定冠词构成短语，表示一个动作：
Eg: Let’s have a swim.
名词转化为动词
很多表示物件、身体部位、某类人的名词可以用作动词来表示动作，某些抽象名词也可作动词。
Eg: Did you book a seat on the plane
Please hand me the book.
She nursed her husband back to health.
We lunched together.
形容词转化为名词
1. 表示颜色的形容词常可转化为名词。
Eg: You should be dressed in black at the funeral.
某些形容词如old, young, poor, rich, wounded, injured等与the连用，表示一类人，作主语时，谓语动词用复数形式。
Eg: The old in our village are living a happy life.
Fill in the blanks with the correct forms of the words.
1. He is one of the best football ________(play) in the world.
2. They were so ________(excite) that they jumped up and down.
3. The question is a little difficult. Let’s have a ________(discuss) about it.
4.He fell ________(sleep) while watching TV.
players
excited
discussion
asleep
Fill in the blanks with the correct forms of the words.
5. The noise made sleep ________ (possible), so I got up and read a book.
6. There isn’t a cloud in the sky. It's going to be ________(sun) tomorrow.
7. It will take about two months if everything goes ________(smooth).
impossible
sunny
smoothly
Fill in the blanks with the correct forms of the words.
8. Thanks to the ________(invent) of the smart phone, it’s convenient to take photos anytime.
9. -Did you hear anything ________(usual) in the street
-Sorry, I’m not sure. I was cleaning the room.
10. We have no ________(choose) but to wait outside.
invention
unusual
choice
Listening and Speaking
Listen and repeat.
Ⅰ
1. I drew a picture of my plants.
2. Are they also coming to plant trees
3. What makes a tree laugh
4. When something touches this plant’s leaves, they close up
tightly.
Listen to the sentences and circle the words or phrases you hear.
Ⅱ
1. A. dust storm B. TV channel C. a flower bud
2. A. dry B. shy C. cry
3. A. eastern B. northern C. southern
4. A. at the top of B. in the bottom of C. in the middle of
5. A. by the way B. in a word C. best of all
Suppose you are Danny. Bring a photo of a plant to class and talk about it with a partner. Answer the following questions.
Ⅲ
1. What kind of plant is it
2. What is it used for
3. Is it important to us
4. How can we protect this plant
Putting It All Together
Read the passage and answer the questions.
Are Plants Important to All Animals
Plants and animals are living things. All living things need food for energy. Without a way to get energy, they would die. Plants and animals get their food in different ways. A plant uses the energy in sunlight to make food for itself. Without sun or oxygen, small plants would not be able to grow into bigger plants. If you put a seed in the ground and give it water and
Ⅰ
Read the passage and answer the questions.
energy from the sun, it will grow. It will grow into good food for other living things, mainly animals. Some animals, such as cows and pandas, eat plants. Some animals eat other animals. We call these animals carnivores. Still, plants feed all animals! How Think of a tiger. The tiger eats animals that eat plants. Without plants, the tiger would have nothing to eat.
Ⅰ
Read the passage and answer the questions.
Ⅰ
1. What are living things
2. Do plants and animals get their food in the same way
3. How does a plant make food for itself
4. What do animals eat
Plants and animals are living things.
No, they don’t.
A plant uses the energy in sunlight to make food for itself.
Some animals eat plants. Some animals eat other animals.
How do you plant a plant Write down your answer and discuss it with your partner.
Ⅱ
1. _____________________________________________
2. _____________________________________________
3. _____________________________________________
I plant a seed in a small pot.
I give it plenty of water and it sprouts a few days later.
Soon, it grows a stem and a leaf.
GOOD JOB
