In the diatonic scale of C major the intervals from C to G, D to A, E to B, F to C, G to D, and A to E are perfect fifths, each consisting of three whole steps or tones and one half step or semitone.

• 在大C自然音阶， C到 G, D 到 A, E 到 B, F 到 C, G 到 D, A到E 为纯 五度，每组包含三个全音和一个半音。B 到 F仅包含三个全音，构成减五度。