Its

“It’s” with an apostrophe
Means it is – all the time!
Using it another way
Is quite a grammar crime.

Whenever I encounter writing
With a misused “it’s,”
My pressure passes by its boiling point
Before it quits.

“Should of,” “would of,” could of”
Are annoying, to be sure;
And for “there,” “their,” “they’re” confusion
No one seems to have a cure.

But the most frustrating writing error
Is, I do believe,
Using “it’s” instead of “its” –
It’s my number one pet peeve!