Meaning and Usage
"誰か" (だれか) means "someone" or "somebody" and is used to refer to an unspecified person. It is very common in everyday conversation when you don't know or don't want to specify who exactly is involved.
Common Contexts
You often use "誰か" when talking about an unknown person performing an action, asking for help, or inquiring if someone is present or coming.
Collocations and Patterns
- 誰かが + verb: Indicates that someone is doing something (e.g., 誰かが来た - Someone came).
- 誰かに + verb: Indicates doing something to someone (e.g., 誰かに聞く - Ask someone).
- 誰か + question: Used to ask if someone is involved (e.g., 誰か来ますか？ - Is someone coming?).
Register and Nuance
"誰か" is neutral and polite enough for daily use. It is informal but appropriate in most situations except very formal writing.
Common Mistakes
Learners sometimes confuse "誰か" with "誰も" (だれも), which means "no one" or "everyone" depending on context. Remember "誰か" always implies at least one person exists or acts.