我最近很忙。

Wǒ zuìjìn hěn máng.

I've been very busy recently.

你最近在忙什么呢？

Nǐ zuìjìn zài máng shénme ne?

What have you been busy doing recently?

我忙着帮我妈妈做家务。

Wǒ mángzhe bāng wǒ māma zuò jiāwù.

I'm busy helping my mother with chores.