

I once lived in that house.
At one time in the past; formerly.
I once had a dog.
She once traveled to Paris.
They once worked together.
once upon a time
once in a while
once again
formerly
previously
at one time
You can only try it once.
One time only; not more than once.
I visited that museum once.
She called me once last week.
He only ate dessert once.
once in a lifetime
once upon a time
once and for all
one time
a single time
one occasion
Once you finish your homework, you can play.
As soon as; at the time that.
Once it stops raining, we can go outside.
Once she arrives, we will start the meeting.
Once you try it, you'll love it.
once in a while
once upon a time
once again
as soon as
when
the moment