Here are some examples of how it might be used:
* Ngui uthuri - You are good.
* Ngui unaienda wapi? - Where are you going?
* Ngui ndio uliyefanya hivyo? - Did you do that?
Important Note: It's important to remember that using the informal "ngui" is appropriate for friends, family members, or people you're close to. When addressing someone older, in a formal setting, or someone you don't know well, it's more respectful to use the formal "wewe".