does they have the same meaning, or not?

[sykim99]

1. The guard explained that he had discovered the man in the passage
and finding that he was seriously ill.

The guard explained that he had discovered the man in the passage
, finding that he was seriously ill.

The guard explained that he had discovered the man in the passage
and found that he was seriously ill.


are they all correct in grammer?
if not, teach me the difference.

 

[Barb_D]

Note: Subject line: Do they have, not Does they. "Do" is for the plural.

1. The guard explained that he had discovered the man in the passage
and finding that he was seriously ill. -- This is incomplete. ... and finding that he was seriously ill, immediately called for an ambulance. You need to say what he did upon finding the man ill.

The guard explained that he had discovered the man in the passage
, finding that he was seriously ill. -- This also feels incomplete although it may be grammatically correct.

The guard explained that he had discovered the man in the passage
and found that he was seriously ill. -- This is a complete thought. He discovered the man and found that he was ill. Similar structure.


are they all correct in grammer?
if not, teach me the difference.