Here's a breakdown of their commonalities:
* They are all essential building blocks of language: Without these parts of speech, we wouldn't be able to form sentences or express ourselves clearly.
* They all contribute to meaning: Each word in a sentence plays a role in conveying the overall message.
* They all have grammatical roles: They function according to specific grammatical rules, even if those roles differ between them.
Here's how their functions differ:
* Nouns: Name people, places, things, or ideas. (e.g., "dog," "city," "table," "happiness")
* Verbs: Describe actions, states of being, or occurrences. (e.g., "run," "sleep," "happen")
* Adjectives: Modify nouns or pronouns by providing more information about them. (e.g., "happy," "big," "red")
While they have different roles, they all work together to create a complete and meaningful sentence.