I can, could, but I wouldn't

Some can and could
while others can't and couldn't

Some will and would
while others will but wouldn't

Some shall and should
while others shan't and shouldn't

The decision to go either way
strongly depends on the repercussion

Though the words couldn't, wouldn't shouldn't
all sound very negative,

They are words that can save a situation,
the user and the receiver.

I say I can, I could, I shall, I will, I would.
I say I can't I won't, I shan't and I shouldn't

when I know that the out come will
be positive to those around.

For it is not I before others.