All phrases

Offering a complete and unqualified apology.

I have a feeling that something bad is going to happen.

That's a good and reasonable point.

A straightforward and friendly way to offer help.

Expressing overwhelming gratitude.

Expressing regret for unforeseen negative outcomes.

Your shrewdness and understanding are praiseworthy.

I'm extremely angry.

I'm somewhat doubtful or hesitant.

A polite way to offer assistance.

Expressing a significant obligation of thanks.

Asking for forgiveness for a poor decision.

I'm truly impressed by your skill and expertise.

I'm feeling stressed and unable to cope.

There are different opinions on whether...

Gives permission in a relaxed and informal way.

Expressing that the help was extremely useful.

Acknowledging the other person's disappointment and expressing a desire to rectify the situation.

You've demonstrated excellent planning and anticipation.

Initially or superficially...

A polite and encouraging way to give permission or acceptance.

It would be wise or cautious to...

Expressing lasting and profound gratitude.

A formal apology for any trouble or difficulty caused.