As a verb:
* We talked for hours about our childhood memories.
* The teacher talked about the importance of recycling.
* Could you talk a little louder, please? I can't hear you.
* The doctor talked to the patient about their diagnosis.
* She talked her way into getting a free ticket to the concert.
As a noun:
* There was a lot of talk about the upcoming election.
* She gave a talk on the history of the city.
* He's always full of talk, but never does anything.
* The talk show host interviewed a famous actor.
In idioms:
* Don't talk back to your elders.
* Let's talk turkey about this problem.
* We need to have a talk about your grades.
As an adjective:
* He gave a talkative performance.
* The party was full of talkative people.
These are just a few examples – the word "talk" is very versatile and can be used in many different ways.