我只做了一件事。

Wǒ zhǐ zuò le yí jiàn shì.

I only did one thing.

你有事吗？我可以帮你。

Nǐ yǒu shì ma? Wǒ kěyǐ bāng nǐ.

Do you have something going on? I can help you.

你今天有什么事吗？

Nǐ jīntiān yǒu shénme shì ma?

Do you have anything to do today?