Do you know :The Summary of “了(le)”

1. As a modal particle, “了” is used at the end of a sentence to indicate something has already happened.

他去学校了。（Tā qù xuéxiào le.）
He went to school.

我们结婚一年了。（Wǒmen jiéhūn yī nián le.）
We got married for 1 year.

2. As a dynamic auxiliary, “了” is used after verbs to refer to the completion of an action. It`s often followed by quantifiers.

去年我看了10本书。（Qùnián wǒ kànle 10 běn shū.）
I read 10 books last year.

我买了很多衣服。（Wǒ mǎile hěnduō yīfu.）
I bought lots of clothes.