1. used to connect words, phrases, or clauses that are to be taken jointly
2. used to indicate addition or continuation
3. used to indicate consequence or result

Examples

• I bought apples and oranges at the store.
• She studied hard and passed the exam.
• The cat sat on the mat and began to purr.
• He opened the door and walked inside.
• We need pencils, paper, and erasers for the test.
• The rain stopped and the sun came out.
• She laughed and clapped her hands.