我有听闻过这件事。

Wǒ yǒu tīngwén guò zhè jiàn shì.

I’ve heard about this.

你在闻什么？

Nǐ zài wén shénme?

What are you smelling?

你闻到香味吗？

Nǐ wéndào xiāngwèi ma?

Can you smell the fragrance?