* 一 (yī): This is the most common way to express "a" or "one". It's used before singular nouns, just like "a" in English.
* Example: 一本书 (yī běn shū) - a book
* 个 (gè): This is a measure word, used to quantify singular nouns. It's often used with "一" to make it sound more natural.
* Example: 一个人 (yī gè rén) - a person
* 件 (jiàn): This is a measure word used for clothes, events, and other things. It can also be used with "一".
* Example: 一件衣服 (yī jiàn yīfu) - a piece of clothing
The choice of word depends on the specific noun you are using. It's best to learn the appropriate measure words for different nouns.
Example:
* 一本书 (yī běn shū) - a book
* 一张桌子 (yī zhāng zhuōzi) - a table
* 一件衣服 (yī jiàn yīfu) - a piece of clothing
* 一个苹果 (yī gè píngguǒ) - an apple
Let me know if you have more questions!