我在学校学英语。

Wǒ zài xuéxiào xué Yīngyǔ.

I study English at school.

他当英语老师已经三年了。

Tā dāng Yīngyǔ lǎoshī yǐjīng sān nián le.

He has been an English teacher for three years.

如果你不会中文，可以用英语问我。

Rúguǒ nǐ bú huì Zhōngwén, kěyǐ yòng Yīngyǔ wèn wǒ.

If you don’t know Chinese, you can ask me in English.