She was the nurse looking after the patient at the time (who was looking)	to replace a relative clause
After giving/having given blood, I went home	with prepositions and conjunctions
Being frightened of needles, Tony was not looking forward to the injection	to explain the reason of sth
Sitting in the waiting room, I could hear the sound of the dentist drilling	to talk about actions happening at the same time
Having found an optician close to the office, I made an appointment for that evening	to talk about actions happening in sequence
Given an aspirin, I began to feel better (When/Because I was given)	as an alternative passive form
Given the chance, I would definitely study pharmacology (If I were given the chance)	as an alternative conditional form