A noun refers to a person, place, thing, or event. These are fundamental parts of a sentence/speech, as they are the subject(s) being talked about. Pronouns, which substitute the noun. Adjectives, which describe the noun. Verb, an action word. Adverb, as modifiers. Conjunction, which connects words. Preposition, often precedes the noun and relates it to another word. And the interjection, an abrupt remark in a sentence. These are the ingredients of an effective and meaningful sentences.