洪恩环境英语第八册练习 Lesson 12

　　This is Lesson Twelve.
In this lesson,you learned the names of a lot of different animals.
Now listen and repeat the name of each animal that you hear.
pigeon            butterfly
fox               deer
wolf              goose
fish              eagle
sheep             mouse
Some of these animal names have regular plurals² and some have irregular plurals.
Listen to the names of these animals again,
but don't repeat what you hear.
Instead,give the plural¹ form of each name you hear.
For example,you hear....
One goose.And you say....
Two geese.Or you hear....
One fox.  And you say...
Two foxes. Ready?Let's begin.
One goose.Two geese.
One fox.Two foxes.
One fish.Two fishi.
One eagle. Two eagles.
One butterfly.Two butterflies.
One mouse.Two mice.
One wolf.Two wolves.
One deer. Two deer.
One pigeon.Two pigeons.
One sheep.Two sheep.
Now listen and change each of the following sentences.
The nouns and verb forms are in the singular.
You change them to the plural.
For example,you hear...
A mouse is a rodent³.And you say....
A mouse is a rodent.Or you hear...
A butterfly is an insect.And you say..
Butterflies are insects.OK?Let's begin.
A mouse is a rodent.Mice are rodents⁴.
A butterfly is an insect.  Butterflies are insects.
A sheep is a mammal.Sheep are mammals.
A goose is a bird.Geese are birds.
An alligator⁵ is a reptile⁶.      Alligators⁷ are reptiles⁸.
Now listen to two or three sentences about animals.
Then combine all the sentences into one sentence,
changing the singular forms to the plural.For example,you hear....
A deer is a mammal.A sheep is a mammal.A cow is a mammal.
And you say....
Deer,sheep,and cows are mammals.
Or you hear...
A fly is an insect.A butterfly is an insect.
And you say...
Flies and butterflies are insects.
Ready?Let's begin.
A deer is a mammal.A sheep is a mammal.
A cow is a mammal.
Deer,sheep,and cows are mammals.
A fly is an insect.A butterfly is an insect.
Flies and butterflies are insects.
An alligator is reptile.A turle is a reptile.
Alligators and turles are reptiles.
A goose is a bird.A chicken is a bird.
A duck is a bird.
Geese,chickens,and ducks are birds.
A lion is a mammal.A wolf is a mammal.A fox is a mammal.
Lions,wolves,and foxes are mammals.
A whale is a mammal.An otter⁹ is a mammal.
Whales and otters¹⁰ are mammals.
Now listen to this man as he describes some of the birds on the pond.
Look at the  two Canadian geese.
This one is beautiful.
The other one is strange-looking.
And look at those two ducks.
This one is green.The other is black.
Now listen to and repeat these sentences.
This one is beautiful.
The other one is strange-looking.
This one is green.  The other is black.
Remember that you can use either the other one or the other.
And you can use either the other ones or the others.
Now listen to the cues and form two sentences.
For example,you hear.....
Book...red.Other one....blue.
And you say...
This book is red.The other one is blue.
Or you hear...
Goose...beautiful.Other...strange-looking.
And you say...
This goose is beautiful.The other is strange-looking.
All right.Let's begin.
Book...red.Other one...blue.
This book is red.The other one is blue.
Goose...beautiful.Other....strange-looking.
This goose is beautiful.The other is strange-looking.
Fish...big,Other...little.
This fish is big.The other is little.
Story...interesting.Other ones...boring.
This story is interesting.The other ones are boring.
Reprt...long.Others...short.
This report is long.The others are short.
Alligator...mean.Other one...meaner.
This alligator is mean.The other one is meaner.
This is the end of Lesson Twelve.

1 plural   

n.复数；复数形式；adj.复数的

参考例句：

• Most plural nouns in English end in's '.英语的复数名词多以s结尾。
• Here you should use plural pronoun.这里你应该用复数代词。

2 plurals   

n.复数，复数形式( plural的名词复数 )

参考例句：

3 rodent   

n.啮齿动物；adj.啮齿目的

参考例句：

• When there is a full moon,this nocturnal rodent is careful to stay in its burrow.月圆之夜，这种夜间活动的啮齿类动物会小心地呆在地洞里不出来。
• This small rodent can scoop out a long,narrow tunnel in a very short time.这种小啮齿动物能在很短的时间里挖出一条又长又窄的地道来。

4 rodents   

n.啮齿目动物( rodent的名词复数 )

参考例句：

• Rodents carry diseases and are generally regarded as pests. 啮齿目动物传播疾病，常被当作害虫对待。 来自《简明英汉词典》
• Some wild rodents in Africa also harbor the virus. 在非洲，有些野生啮齿动物也是储毒者。 来自辞典例句

5 alligator   

n.短吻鳄(一种鳄鱼)

参考例句：

• She wandered off to play with her toy alligator.她开始玩鳄鱼玩具。
• Alligator skin is five times more costlier than leather.鳄鱼皮比通常的皮革要贵5倍。

6 reptile   

n.爬行动物；两栖动物

参考例句：

• The frog is not a true reptile.青蛙并非真正的爬行动物。
• So you should not be surprised to see someone keep a reptile as a pet.所以，你不必惊奇有人养了一只爬行动物作为宠物。

7 alligators   

n.短吻鳄( alligator的名词复数 )

参考例句：

• Two alligators rest their snouts on the water's surface. 两只鳄鱼的大嘴栖息在水面上。 来自辞典例句
• In the movement of logs by water the lumber industry was greatly helped by alligators. 木材工业过去在水上运输木料时所十分倚重的就是鳄鱼。 来自辞典例句

8 reptiles   

n.爬行动物，爬虫( reptile的名词复数 )

参考例句：

• Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。 来自《简明英汉词典》
• Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。 来自《现代汉英综合大词典》

9 otter   

n.水獭

参考例句：

• The economists say the competition otter to the brink of extinction.经济学家们说，竞争把海獭推到了灭绝的边缘。
• She collared my black wool coat with otter pelts.她把我的黑呢上衣镶上了水獭领。

10 otters   

n.（水）獭( otter的名词复数 )；獭皮

参考例句：

• An attempt is being made to entice otters back to the river. 人们正试图把水獭引诱回河里去。 来自《简明英汉词典》
• Otters are believed to have been on Earth for 90 million years. 水獭被认为存活在地球上已经9千多万年。 来自互联网