Be

If she is not in on it,
it is not on and
I am off, bye bye.

to be in on
to be on
to be off

 

Be

He‘s up to something.
Can he be on to us?

Be

She was up for a wild party,
but she was really down because
she wasn’t up to singing herself.

Be

The party was on,
but she was down,
because the concert was off
and so was (off) all the food in the fridge.