The correct options are as follows, the participial phrases are written in capital letters:
9. The boys, HAVING FINISHED THEIR DINNER, rushed to the base ball field.
10. TOLD OF A POSSIBLE FLU EPIDEMIC, the employees signed up to be inoculated.
11. The girls were frightened at the strange noises COMING FROM THE OLD HOUSE.
12. I see a thread HANGING FROM YOUR SHIRT.
A participle is a verbal that is used as an adjective and it always end in 'ing or 'ed'. Participles modify pronouns and nouns. There are two types of participles, present and past participles. A participial phrase is made up of a present participle or a past participle, modifiers, objects and complements. In a sentence, the participial phrase can appear before the main clause, after the main clause or in middle sentence position.
