Sometime:
- Sometime is an adverb that refers to an unspecified point in time.
- It can be used as a noun, adjective, or adverb.
- It indicates an indefinite or unknown time in the future or past.
- It is often used to describe an event that will happen or happened, but without specifying when.
- It can also mean "at some point" or "eventually".

Example:
1. Noun: I will meet you sometime next week.
2. Adjective: I need to schedule a sometime appointment with the doctor.
3. Adverb: I will call you sometime later today.

Sometimes:
- Sometimes is an adverb that refers to a certain frequency or occurrence.
- It is used to describe actions or events that happen occasionally, but not all the time.
- It indicates that something happens at irregular intervals or on certain occasions.
- It is often used to express a general statement about past, present, or future events.

Example:
1. I sometimes go for a run in the morning.
2. She sometimes forgets to lock the door.
3. They sometimes visit their grandparents on weekends.

Difference:
- The main difference between sometime and sometimes is that sometime refers to an unspecified point in time, while sometimes refers to a certain frequency or occurrence.
- Sometime is used to indicate an uncertain or unknown time, while sometimes is used to describe actions that happen occasionally.
- Sometime can also function as a noun or adjective, while sometimes is solely an adverb.

In summary, sometime refers to an unspecified point in time, while sometimes indicates a certain frequency or occurrence.