Sentence components (also known as parts of a sentence) are the building blocks that work together to form a complete, grammatically correct sentence. Understanding these is essential in grammar, writing, and natural language processing (NLP).

🧱 Main Components of a Sentence

1. Subject

The person, thing, or idea that the sentence is about; it performs the action.

  • The dog barked loudly.

2. Predicate

Tells what the subject does or is; contains the verb and any accompanying words.

  • The dog barked loudly.

🔹 Core Elements of the Predicate

3. Verb (Predicate Verb)

The action or state of being.

  • She runs every morning.
  • They are happy.

4. Object

Receives the action of the verb.

  • Direct Object: Receives action directly.
    • He reads books.
  • Indirect Object: Benefits from the action.
    • She gave him a gift.
      (“him” is the indirect object, “a gift” is the direct object)

🧩 Additional Components

5. Complement

Completes the meaning of the subject or verb.

  • Subject Complement: Renames or describes the subject (often after linking verbs like be, seem, become).
    • He is a teacher.
  • Object Complement: Renames or describes the object.
    • They elected her president.

6. Modifier

Adds information (adjectives, adverbs, phrases, clauses).

  • The tall man walked quickly.
  • The book on the table is mine. (prepositional phrase modifier)

🧠 Sentence Structure Example

The little boy (subject) kicked (verb) the ball (direct object) over the fence (modifier).

Summary Table:

ComponentFunctionExample
SubjectWhat/who the sentence is aboutThe cat
VerbAction or stateslept
Direct ObjectReceives the actionthe toy
Indirect ObjectBenefits from the actionher (in gave her a gift)
Subject ComplementRenames/describes subjecta doctor (in He is a doctor)
Object ComplementRenames/describes objectpresident
ModifierAdds detail (adjectives/adverbs/phrases)quickly, on the table

Would you like a diagram (like a sentence tree) to visually break down sentence components?