A conjunction is a word that connects other words, phrases, or sentences together. The most common conjunctions are and, but, and or. When you say “I like pizza and ice cream,” the word and is a conjunction joining two things you like. When you say “I wanted to play outside, but it started raining,” the word but connects two related ideas.

Conjunctions work like bridges in your sentences, helping ideas flow together smoothly. Without them, you'd have to speak in short, choppy sentences: “I woke up. I got dressed. I ate breakfast.” With conjunctions, your thoughts connect naturally: “I woke up, got dressed, and ate breakfast.”

Different conjunctions create different relationships between ideas. And adds things together. But shows contrast or contradiction. Or presents choices or alternatives. More sophisticated conjunctions like because, although, while, and unless show even more complex relationships: “I'll finish my homework because I want to play later” or “Although it's cold outside, I still want to go sledding.”

Learning to use conjunctions well helps you express complicated thoughts clearly, connecting your ideas so others can follow your thinking from start to finish.