Verbs:
* Run: "I run to the store." (verb, not a preposition)
* Jump: "She jumped over the fence." (verb, not a preposition)
* Sing: "They sang a song." (verb, not a preposition)
Adjectives:
* Happy: "He's a happy man." (adjective, not a preposition)
* Blue: "The sky is blue." (adjective, not a preposition)
* Big: "She has a big house." (adjective, not a preposition)
Adverbs:
* Quickly: "He ran quickly." (adverb, not a preposition)
* Slowly: "She walked slowly." (adverb, not a preposition)
* Happily: "They danced happily." (adverb, not a preposition)
Nouns:
* Dog: "The dog barked." (noun, not a preposition)
* Table: "He sat at the table." (noun, not a preposition)
* Book: "She read a book." (noun, not a preposition)
Conjunctions:
* And: "He went to the store and bought some milk." (conjunction, not a preposition)
* But: "She wanted to go, but she was tired." (conjunction, not a preposition)
* Or: "Would you like tea or coffee?" (conjunction, not a preposition)
Determiners:
* The: "The dog barked." (determiner, not a preposition)
* A: "He bought a book." (determiner, not a preposition)
* This: "This is my house." (determiner, not a preposition)
Pronouns:
* He: "He went to the store." (pronoun, not a preposition)
* She: "She bought a book." (pronoun, not a preposition)
* They: "They went to the park." (pronoun, not a preposition)
Remember, a preposition always precedes a noun or pronoun and indicates a relationship between it and another word in the sentence.