Is the word maybe sometimes written separately?

You are correct! "Maybe" is sometimes written as two words: "may be".

Here's the breakdown:

* Maybe (one word) is an adverb that means "perhaps" or "possibly".

* May be (two words) is a verb phrase that indicates possibility.

Examples:

* Maybe I'll go to the party. (adverb)

* It may be too late to buy tickets. (verb phrase)

It's important to note that "may be" can sometimes be used as a synonym for "maybe", but it is always grammatically correct to write "maybe" as one word.