1. Adjectives:
* Past: Describing something that happened before the present.
* Example: "The past week has been busy."
* Present: Describing something that is happening now.
* Example: "The present moment is all we have."
* Future: Describing something that will happen later.
* Example: "The future is uncertain."
2. Nouns:
* Past: Referring to a period of time before the present.
* Example: "The past is a foreign country."
* Present: Referring to the current time.
* Example: "Let's focus on the present."
* Future: Referring to a time after the present.
* Example: "What does the future hold?"
3. Adverbs:
* Past: Describing an action that occurred before the present.
* Example: "He has been there past midnight."
* Present: Describing an action that is happening now.
* Example: "He is present in the room."
* Future: Describing an action that will happen later.
* Example: "She will be there in the future."
4. Prepositions:
* Past: Indicating a position or direction behind or beyond something.
* Example: "The car drove past the house."
* Present: Indicating a position in front of or before something.
* Example: "He stood present at the ceremony."
* Future: Indicating a direction towards a later time.
* Example: "We are looking forward to the future."
Note: The specific part of speech depends on the sentence structure and how the words are used.