* Determiner: When used before a noun (e.g., "each student," "each day"), it acts as a determiner, specifying the quantity or number.
* Pronoun: When used independently, referring to a previously mentioned group (e.g., "They each had a turn."), it acts as a pronoun.
Let me know if you have a specific sentence in mind, and I can help you determine the part of speech in that context!