No, “almost” is not a preposition. It is an adverb.
Uses of “Almost” as an Adverb:
- Modifying a Verb (Indicating Near Completion)
- I almost finished my meal.
- She almost missed her reservation.
- Modifying an Adjective (Indicating Near Totality)
- The dish was almost perfect.
- The restaurant is almost full tonight.
- Modifying Another Adverb (Indicating Near Degree)
- He arrived almost immediately.
- The order was almost completely wrong.
Why “Almost” Is Not a Preposition
- Prepositions (e.g., in, on, under, about) show relationships between words.
- “Almost” does not introduce a noun or pronoun; instead, it modifies verbs, adjectives, or adverbs, making it an adverb.
Thus, “almost” is an adverb, not a preposition.