English sentence elements

The first one is used as an adjective complement, that is, this infinitive is used to modify sorry. Why am I sorry? The specific matter of my sorry is completely reflected in the infinitive behind. The second is as the object (also called the verb object), that is, as the receiver of the verb (this action) it modifies. I want to try, this is the trunk, and the back is what I want to try and who to do. I hope I can help the landlord.