——How many cats are there?

——There is one.

is和are的用法

1.are可以用于第一人称、第二人称、第三人称;is只用于第三人称。

2.are可以用于单数、复数;is只用于单数。

具体用法：

are用在第二人称单数(you)和所有的复数(we，you，they)后面;is用在第三人称单数(he，she，it)后面。

are的过去式是were，is的过去式是was。

扩展资料

用are的不可属名词种类

1. 材质：

wood, metal, glass, paper, cloth, cotton, silk, plastic, concrete, rubber, clay。

2. 气体与液体：

air, gas, steam, smoke, pollution, oxygen; water, blood, sweat, shampoo, paint。

3. 食物、饮料、农作物、固体与半固体日用品：

food, meat, beef, pork, bread, pasta, cheese, ketchup, mayonnaise, chocolate, oil, soy。

sauce; milk, juice, coffee, tea, water, wine, beer; wheat, rice, corn/maize, grass, sugar cane; glue, soap, toothpaste, shoe polish。

4. 由微粒／细条组成，或成片的物质：

dirt, sand, powder, flour, sugar, salt, pepper, cinnamon; hair, fur, skin。

5. 自然现象：

weather, wind, rain, snow, ice, fog, dew, humidity, thunder, lightning, electricity, sunshine, heat, cold, gravity, time。

6. 组合与总称（集合名词）：

furniture, bedding, clothing, underwear, fruit, machinery, housing, traffic, jewelry, medicine, makeup, money, cattle, poultry, equipment, software, baggage, luggage, mail, research,。

homework, grammar, vocabulary, alphabet, information, slang, gossip, feedback, staff, faculty, audience, stuff, junk, garbage。

7. 活动、动名词、疾病：

basketball, tennis, chess, work, sleep, music, leisure; running, swimming, cleaning; cancer, pneumonia, polio。

8. 抽象概念与学科：

truth, happiness, honesty, beauty, death, fun, help, intelligence, knowledge, progress, information, advice; science, history, literature, law, art, religion。

参考资料来源：百度百科——不可数名词

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