The indefinite articles A/AN are used when talking about a general or non-specific noun.
不定冠詞A/AN指的是一般名詞或非特定名詞。

Where is a teacher?/A book is on the table./Did you bring a cake?
老師在哪里？/桌子上有一本書。/你帶蛋糕了嗎？

But unlike the definite article, A/AN can only be used with singular countable nouns. We can’t say a teachers, a books, a cakes.
但與定冠詞不同，A/AN只能用于單數(shù)可數(shù)名詞。我們不能說是a teachers, a books, a cakes。

Instead we use the definite article: the teachers, the books, the cakes.
取而代之的是定冠詞：the teachers, the books, the cakes。

Where are the teachers?/The books are on the table./Did you bring the cakes?
老師們?cè)谀睦铮?書在桌子上。/你把蛋糕帶來了嗎？

Remember!
記得！

In English, we use an with any noun that starts with a vowel sound, NOT with a noun that starts with a vowel. This is very important because many nouns that start with a vowel don’t have a vowel sound such as university, we say a university NOT an university. Also, many vowel sounding words don’t start with a vowel for example hour, we say an hour.
在英語(yǔ)中，我們使用以元音開頭的任何名詞，而不是以元音開頭的名詞。這一點(diǎn)非常重要，因?yàn)樵S多以元音開頭的名詞沒有元音，比如大學(xué)，我們說的大學(xué)不是大學(xué)。而且，許多聽起來像元音的單詞都不是以元音開頭的，比如小時(shí)，我們說一小時(shí)。

Below is a list of nouns you can use ‘a(chǎn)n’ with:
下面是可以與“an”一起使用的名詞列表：

an oven/an apple/an honour/an octopus/an auntie/an injury/an umbrella/an egg
烤箱/蘋果/榮譽(yù)/章魚/阿姨/受傷/雨傘/雞蛋

Here is a list of nouns used with A:
下面是與a一起使用的名詞列表：

a table/a pillow/a university/a cake/a bed/a utopia
桌子/枕頭/大學(xué)/蛋糕/床/烏托邦

Here is a list of nouns used with An:
下面是與一個(gè)An連用的名詞列表：

an oven/an orange/an honour/an invention/an hour/an evening
烤箱/桔子/榮譽(yù)/發(fā)明/一小時(shí)/一晚

Here are examples of how we use A and An in a sentence:
下面是我們?nèi)绾卧诰渥又惺褂肁和An的例子：

There is a university close to here./The movie starts in an hour./There is an octopus in the water./The new house doesn’t have an oven but it has a washing machine./I need an umbrella, it’s raining outside.
附近有一所大學(xué)。/電影一小時(shí)后開始。/水里有一只章魚。/新房子沒有烤箱，但有洗衣機(jī)。/我需要一把傘，外面在下雨。

THE is called a definite article, we use the with all nouns and for specific nouns, like a certain person or a particular thing.
The被稱為定冠詞，我們使用與所有名詞和特定名詞，如某個(gè)人或某事物。

For example:
舉例：

Where is the teacher?/The book is on the table/Did you bring the cake?
老師在哪里？/書在桌子上/你帶蛋糕了嗎？

The examples above are talking about specific things or people. In the first example, they are looking for a specific teacher, maybe a biology teacher or an English teacher. They are not looking for any teacher, they want to know where that particular teacher is.
上面的例子是談?wù)撎囟ǖ氖挛锘蛉?。在第一個(gè)例子中，他們正在尋找一個(gè)特定的老師，也許是一個(gè)生物老師或者一個(gè)英語(yǔ)老師。他們不找老師，他們想知道那個(gè)老師在哪里。

The other two examples have a similar concept, example two is talking about a specific book on a specific table. And the third example is talking about a particular cake, maybe a birthday cake or a wedding cake.
另外兩個(gè)例子有一個(gè)相似的概念，例子二是在一個(gè)特定的桌子上談?wù)撘槐咎囟ǖ臅?。第三個(gè)例子是一個(gè)特別的蛋糕，可能是生日蛋糕或者婚禮蛋糕。

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