you never know what you've got till it's gone
People tend to take things for granted while they are available.
ADJ.
all, alone, bad, better, mad, old, overnight, safe
My grandfather has gone a bit mad since he retired last year.
VERB + GONE
fire, hurry, milk, needn't, said, surprise, thought
The milk has gone bad, so we'll need to buy some more at the store.
GONE + NOUN
brazil, o'clock, paris, school, things
She's gone to Paris for two weeks to visit her sister.
PREP.
down, in, on, out, than, up
The power went out during the storm and hasn't come back on yet.
ADV.
already, prolly
She's already gone to the store by the time I woke up this morning.