A sentence follows this pattern: Subject + Verb (+ Object/Complement). For example:
This forms: "The cat chased the mouse."
| Type | Structure | Example |
|---|---|---|
| Simple | One independent clause | She runs daily. |
| Compound | Two independent clauses joined by a conjunction | He studied hard, so he passed the test. |
| Complex | One independent clause + one dependent clause | Although it rained, we went to the park. |
| Compound-Complex | Two independent clauses + one dependent clause | She wanted to go swimming, but her friends preferred movies, even though she loves films too. |
Many writers confuse fragments and run-on sentences. A fragment lacks a subject or verb: "Running through the park." To fix it, add a subject or verb: "She was running through the park." A run-on sentence improperly joins independent clauses: "I love reading books they make me smarter." Fix it with a period or conjunction: "I love reading books. They make me smarter." or "I love reading books because they make me smarter."
The subject and verb must agree in number. Singular subjects take singular verbs, plural subjects take plural verbs. For example:
Tricky cases arise with collective nouns (team, group) and compound subjects. When subjects are joined by "and," use a plural verb. With "or" or "nor," the verb agrees with the nearer subject.
Let's build a sentence step-by-step. Start with a subject: "The scientist." Add a verb: "discovered." Include an object: "a new element." This creates: "The scientist discovered a new element." For complexity, add a dependent clause: "While researching radioactivity, the scientist discovered a new element."
Understanding how to compose a sentence correctly ensures clear communication. Practice combining different structures and checking for agreement errors to improve writing skills.