Which sentence would be correct?

a) It has been some time since I attended school.

b) It has been sometime since I attended school.

Thank you!

A is correct.

The correct sentence would be:

a) It has been some time since I attended school.

To determine this, we can look at the usage of "some time" and "sometime" in the English language.

"Sometime" is an adverb that means "at an indefinite or unspecified time." It is often used when referring to future events. For example, "Let's have dinner sometime next week."

On the other hand, "some time" refers to a certain amount or period of time. It is used to describe a length of time that has passed or will pass. For example, "I need some time to finish this project."

In your sentence, you are talking about a specific period of time since you attended school, so "some time" is the correct choice.