Two boys sit on a trampoline .
The boys were recently bouncing on the trampoline .
Two boys sit on a trampoline.
The boys were recently bouncing on the trampoline.
We see the two boys sitting on the trampoline but we can't be certain that they were recently jumping on it so it's neutral.
We see the two boys sitting on the trampoline but we ca n't be certain that they were recently jumping on it so it 's neutral .