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Posted on by Tony Erickson

What Does a Sentence Have to Have?

Diagram showing subject and predicate in a sample sentence

A sentence must contain at least one subject and one predicate to express a complete thought.

How a Sentence Works

A sentence functions as a unit of language that conveys a statement, question, command, or exclamation. It organizes words into meaningful structures.

For example: "The cat sat on the mat." Here, "The cat" is the subject, and "sat on the mat" is the predicate.

Main Components of a Sentence

Every sentence requires two core elements:

A predicate always includes a verb. For example, in the sentence "Birds fly south," "Birds" is the subject and "fly south" is the predicate.

Types of Sentences

Sentences can be classified based on their structure and purpose:

Type Description Example
Simple One subject and one predicate "She sings."
Compound Two or more independent clauses joined by a conjunction "He ran, and he won."
Complex One independent clause and at least one dependent clause "Although it rained, we went to the park."
Compound-Complex Two or more independent clauses and at least one dependent clause "She wanted to go to the concert, but she couldn't get tickets, so she stayed home."

Common Misconceptions

Many people think a sentence must always include an object. However, objects are optional. For example, "She sleeps" is a complete sentence even though it lacks an object.

Another misconception is that every sentence must be long. Short sentences like "Go!" or "Stop!" are complete because they include a subject (implied "you") and a predicate.

Fully Worked Example

Consider the sentence: "The children played in the park."

This sentence meets the criteria because it has both a subject and a predicate. It expresses a complete thought.


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