Participle Clauses
Participle clauses use a present participle (-ing) to join together sentences, whether in the present or the past, that have the same subject.
Troy stars Brad Pitt and Orlando Bloom.
It is a very exciting film.
Both of these sentences have the same subject (Troy).
Starring Brad Pitt and Orlando Bloom, Troy is a very exciting film.
Another example:
Johnny Depp appeared in Pirates of the Caribbean, Chocolat, and many other films.
He's one of the most talented actors of his generation.
Appearing in Pirates of the Caribbean, Chocolat, and many other films, Johnny Depp is one of the most talented actors of his generation.
Participle clauses use a past participle if the main verb is passive.
Troy was filmed in North Africa.
It stars Brad Pitt and Orlando Bloom.
Filmed in North Africa, Troy stars Brad Pitt and Orlando Bloom.