具有两种复数形式的名词 a.fish在表示鱼的数量时.单数和复数同形,在表示鱼的种类时.复数为fishes. My cat had two little fish for lunch.我的猫午餐吃了两条鱼. You can see a lot of different fishes in the lake.你在湖里可以看见很多种鱼. b.people在表示“人.人民 时是复数意义,在表示“民族 时.为普通名词.其复数为peoples. We want two more people for help.我们还需要两个人帮忙. There are 56 peoples in China.中国有56个民族. c.只有复数形式的名词 有些名词只有复数形式.不能被具体的数字修饰.如:trousers裤子clothes衣服shorts短裤goods商品glasses眼镜 查看更多

 

题目列表(包括答案和解析)

小博士:细心的同学们肯定发现了有些名词有单数(singular)和复数(plural)两种形式,而有些名词只有单数形式,这是怎么回事呢?让我来告诉你吧。英语中,名词按其所表示的事物的性质,可分为可数名词(countable noun)和不可数名词(uncountable noun),可数名词有复数形式,不可数名词一般没有复数形式。名词单数变复数的变化规则见下表。

比一比,看谁写的单词多!

1  直接加-s的单词有:________________________________.

2  加-es的单词有:___________________________________.

3  变y为i再加-es的单词有:__________________________.

4  不规则变化的单词有:_______________________________.

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炭疽病由炭疽杆菌引起,炭疽杆菌感染人体后能产生两种极厉害的毒素——致死因子和水肿因子,使动物和人致病或死亡。结合下列人体免疫过程图解回答问题:
(1)炭疽杆菌感染人体后,其产生的毒素能刺激体内产生__________,将其消灭,这种物质的化学本质是__________,这种免疫方式属于____________免疫。
(2) 当毒性极强的炭疽芽孢杆菌第一次进入人体之后作为            
起作用,使其体内产生了具有免疫力的物质,与该物质产生有关
的细胞有吞噬细胞、____________、_____________和__________。
(3) 若多种病原体进入体内都能直接被吞噬细胞吞噬而消灭,这属于___________免疫。有些毒性很强的病原体经过上述过程不能被清除,只是将其__________________暴露出来,呈递给记忆细胞,使之迅速增殖分化为效应B细胞或效应T细胞,如果病原体是胞内寄生菌,则要通过_____________免疫的方式才能将其消灭。记忆细胞对抗原的记忆、识别和免疫等是依赖于细胞膜上的_______________实现的。
(4) 若病毒等侵入T细胞并使之大量死亡,使人丧失免疫功能,导致各种传染病的发生,这属于获得性________________病。

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小博士:仔细观察下面的句子,你会发现动词“like”有两种不同形式,找找看,它们的用法有什么不同呢?

I like apples.
They like oranges.
You don't like apples.
We don't like oranges.
He/She likes salad.
It likes meat.
Do you like bananas?
Yes, I do. /No, I don't.
Does she/he/it like bananas?
Yes, she/he/it does./No, she/he/it doesn't.

试着填好下面的表格。

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选择适当的词(组)并用其适当形式完成短文。每个词(组)只使用一次,其中有两个是多余的。

  A father was really worried about his son, who was sixteen years old but had no   1   at all.So the father decided to call on a monk(修道士)to train   2   child.

  The monk said to the boy's father,“You should leave your son alone here, I'll make him into a   3   man within three months.However, you can't come to see him during this period.”

  Three months   4  , the boy's father came.The monk arranged a box match   5   the child and an experienced boxer.Each time the fighter struck the boy, he fell down, but   6   the boy stood up, and each time he was knocked down again, then the boy stood up again.After several times, the monk asked,“What do you think of your child?”

  “  7   a shame(羞愧)!”the boy's father said.“I never thought he would be so easily knocked down.I needn't have him   8   here any longer.”

  “I am sorry   9   that's all you see.Don't you see that each time he falls down, he stands up again instead of   10  ?That's the kind of courage you wanted him to have.”

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用所给词的适当形式填空,有两个是多余的。

  Mr.Knott was a teacher.He   1   in a big school in London.

  He   2   a long way from the school.So he was usually quite   3   when he got home.At nine o’clock one evening, when he was in bed, the telephone bell   4   in the hall of his house, so he went downstairs, picked up the telephone and said, “This is White Bridge 3165.Who’s   5  , please?

  “Watt,” a man answered.

  “What’s your name, please?” asked Mr.Knott.

  “Watt’s my name.”

  “Yes, I   6   you that.What’s your name?” Mr.Knott said again.

  “I told you, Watt is my name,”   7   the other man.“  8   you Jack Smith?”

  “No, I’m Knott,” answered Mr.Knott.

  “Will you give me your name, please?” said Mr.Watt.

  “Will Knott,” answered Mr.Knott.

  Both Mr.Watt and Mr.Knott   9   their telephone down   10   and thought, “That is a rude, stupid man.”

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