Answer:
After rewriting the sentence beginning with a participial phrase, we have:
Talking to her friend, she forgot everything around her.
Step-by-step explanation:
A participial phrase consists of a past or present participle followed by modifiers or complements. Take a look at the examples below:
- Tired from the competition, she went home before everyone else. --> "tired" is a past participle
- Walking by the sea, we talked about our dreams and fears. --> "walking" is a present participle
Thus, to rewrite the sentence in the question with a participial phrase, all we need to do is transform one of clauses. The best choice is the first clause "she was talking to her friend." To make it a participial phrase, we eliminate the subject and any auxiliary verbs, using only the main verb in the present participle (-ing):
Talking to her friend, she forgot everything around her.