By Structure  

Structure refers to the grammatical components that make up a sentence.  

 a. Simple Sentence  

- Definition: A sentence with only one independent clause. It expresses a complete thought.  

- Formula: Subject + Predicate  

- Example: The dog barked.  

  - Subject: The dog  

  - Predicate: barked  

 b. Compound Sentence  

- Definition: A sentence with two or more independent clauses joined by a coordinating conjunction (FANBOYS: for, and, nor, but, or, yet, so) or a semicolon.  

- Formula: Independent Clause + [, FANBOYS] + Independent Clause  

- Example: The dog barked, and the cat hissed.  

 c. Complex Sentence  

- Definition: A sentence with one independent clause and at least one dependent (subordinate) clause.  

- Formula: Independent Clause + Subordinating Conjunction + Dependent Clause  

- Example: Although it was raining, we went for a walk.  

  - Independent Clause: we went for a walk  

  - Dependent Clause: Although it was raining  

 d. Compound-Complex Sentence  

- Definition: A sentence with at least two independent clauses and at least one dependent clause.  

- Formula: Independent Clause + [, FANBOYS] + Independent Clause + Dependent Clause  

- Example: Although it was raining, the dog barked, and the cat hissed.  

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