A grammar lesson

The grammar of apologies is "I'm sorry for" plus a progressive or past progressive verb, or "I'm sorry that" followed by a dependent clause that has "I" as the subject. In either case, preferably using a verb specifically describing what was done, and not a vague "hurt" or "offended." The grammar of non-apologies is "I'm sorry if," and/or a dependent clause that is in the passive, and/or a dependent clause that has "you" as the subject, often with any of these combined with vague "hurt" or "offended" verbs, or verbs about understanding or comprehension.