Sang is the past tense of the verb sing. It describes the act of making musical sounds with your voice that happened in the past.

When you say “I sang in the school concert last night,” you're telling someone about singing that already occurred. When “The birds sang at dawn,” it means their musical chirping happened earlier that morning. If someone says “We sang happy birthday to my grandmother,” they're describing a moment of celebration that's now complete.

The verb follows an irregular pattern: sing becomes sang in the past tense, then sung when used with helping verbs like “have” or “has” (I have sung that song before).

You'll encounter sang constantly in stories and conversations about music, celebrations, or any time people made a melody with their voices. “The choir sang beautifully” tells you about a performance that finished. “She sang her baby to sleep” describes a tender moment that's now a memory.