你有带伞吗？

Nǐ yǒu dài sǎn ma?

Did you bring an umbrella?

下雨了，你有带伞吗？

Xiàyǔ le, nǐ yǒu dài sǎn ma?

It's raining, did you bring an umbrella?

我没带伞，要去买一把。

Wǒ méi dài sǎn, yào qù mǎi yì bǎ.

I didn't bring an umbrella, I need to go buy one.