so
so many
so many times
so many times I’ve
so many times I’ve started
so many times I’ve started a
so many times I’ve started a poem
so many times I’ve started a poem over
(and over)        I’ve started a poem over and
(over)              I’ve started a poem over and over
(and over again) (and again) (and again) (and again)

and

so
so many
so many times
so many times I’ll
so many times I’ll do
so many times I’ll do it
so many times I’ll do it again
(and again)      I’ll do it again and again
(and again and again and again and again and again)