I 'Use' To Be Many Things

I 'use' to be many things!
Like Mother Nature I am.
When 'she' decides...
It is time for Fall, Winter
Summer or Spring.

I 'use' to be in fifth grade!
And sometimes I 'act'
As if lessons learned...
I have yet in my life made,
To prove that at all!

I 'use' to have youthful looks.
And denied I was aging.
I 'use' to be what others say I had been.
And as long as I live...
I will always be what it was,
I am not now!