In this simple sentence, Jeff is the complete subject and went to band practice is the complete predicate. The end.
Example 2
The tired farmer hit the snooze button.
The snooze button: it can be your best friend and your worst enemy. In this sleepy simple sentence, we have one complete subject, The tired farmer, and one complete predicate, hit the snooze button.
Example 3
My grandson Max runs a 23-minute mile.
Sounds like Max might want to start hitting the gym more than once a year. In this simple sentence, we have one complete subject, My grandsonMax, and one complete predicate, runs a 23-minute mile.