Question

complete the text with the better phrase.
i _______ known better than to try to fix the tv myself instead of calling a professional.
should of
should have
submit

Explanation:

"Should have" is the grammatically correct phrase for expressing a regret about a past action. "Should of" is a common incorrect misspelling/usage, as the correct structure for this modal perfect form is the auxiliary verb "have", not the preposition "of".

Answer:

should have