I have been working on my English grammar recently and I have two small questions. Could you please help me~~~~

He found himself in the hospital. He is the subject, found is the predicate, and himself is the object in the hospital. It further explains the situation of himself, that is, he found himself in the hospital. Therefore, it is a supplementary explanation of the object. Become the complement of the object.

They held a party in Hollywood. They are the subject, held is the predicate, a party is the object, and in Hollywood just describes the place where the party was held, and is an adverbial adverb of place.

The first sentence should be translated as "He found himself in the hospital", but cannot be translated as "He found himself in the hospital", so it is a supplement. The second sentence is translated as "They held a party in Hollywood" but cannot be translated as "They held a party in Hollywood". Its composition can also be seen from a translation perspective.

It is very kind of you to help me. It is the formal subject is the predicate very kind slogan of you logical subject to help me the real subject. The original sentence should be To help me is very kind of you. But in this sentence, it replaces the subject to help me and puts the real subject at the end.