As a verb:
* The river streams through the valley.
* I streamed the movie online.
* Tears streamed down her face.
As a noun:
* The stream was filled with sparkling water.
* She enjoyed the stream of consciousness writing workshop.
* The company has a strong stream of revenue.
As part of a phrase:
* We sat by the stream and listened to the birds.
* He's always in the stream of new ideas.
* She was caught in the stream of traffic.
The best way to use "stream" in a sentence depends on the context and what you want to convey.