Sometime, some time, and sometimes are easy to confuse because they share the same letters. The space, and the extra s, change the grammar and the meaning.
Sometime is an adverb meaning “at an unspecified time.” It points to when, but the exact moment is unknown or unimportant.
- “Let’s meet sometime next week.”
- “I should call her sometime soon.”
Some time is a phrase meaning “a period of time.” It points to how long something takes or how much time you need.
- “I need some time to think.”
- “We spent some time looking for the keys.”
Sometimes is an adverb meaning “occasionally” or “on some occasions.” It describes frequency.
- “I sometimes forget my password.”
- “It rains sometimes in April.”
A quick check: if you can replace it with at an unknown time, choose sometime. If a while fits, use some time. If occasionally fits, use sometimes.