Here's what it means in simpler terms:
* It's the opposite of a negative sentence. Negative sentences use words like "not," "no," "never," etc. to express the absence of something.
* It makes a direct statement. It doesn't ask questions, give commands, or express uncertainty.
Examples:
* Positive: The sun is shining.
* Negative: The sun is not shining.
* Positive: I like pizza.
* Negative: I don't like pizza.
* Positive: She went to the store.
* Negative: She didn't go to the store.
In short, a positive sentence is a simple, straightforward statement about something that exists or is true.