"I'm sorry for arriving late to the meeting; I should have better managed my time."
Apologies
"I missed the deadline because my computer crashed, and I lost all my work."
Excuses
"I didn't complete the assignment because I had a family emergency."
Excuses
"I would have completed the task, but I had too many other things on my plate."
Excuses
I'm sorry for the mistake in the report
Apologies
"I didn't meet the expectation because the task was too challenging for me."
Excuses
I want to apologize for the delay in responding to your email
Apologies
"I sincerely apologize for my thoughtless comment; it was insensitive, and I regret saying it."
Apologies