a vs an

网络搜索结果：
a 是人们最常用的表达方式。

这两句话的差异是什么？

"a" 和 "an" 都是不定冠词，用于表示单数名词。它们的主要区别在于发音：当名词以辅音音素开头时用 "a"，如 "a cat"；而当名词以元音音素开头时用 "an"，如 "an apple"。例如，"a book" 和 "an hour" 中，"hour" 的首音是元音音素，因此用 "an"。总之，选择 "a" 还是 "an" 取决于后面单词的发音，而不是拼写。

a的例句

A cat sat on a mat and looked around.

She picked a flower from the garden.

There was a loud noise coming from the attic.

He has a passion for cooking exotic dishes.

I found a beautiful shell on the beach.

She took a small step towards the door.

He opened a book and started reading.

The child gave a cheerful smile.

They saw a bird flying high in the sky.

It was a perfect day for a picnic in the park.
an的例句

I saw an elephant at the zoo.

She wants to be an artist when she grows up.

He gave me an apple from his lunch.

They are planning an event for the community.

I need an umbrella because it's raining.

She is reading an interesting book about history.

Can you pass me an orange from the basket?

He is looking for an apartment in the city.

We had an amazing time at the concert.

This is an example of great teamwork.