Participle clause

I picked up my bag and left the room.
Two clauses with a conjunction.Picking up my bag, I left the room.
The same idea with a participle clause.Walking in the park, my bad mood disappeared.
This is wrong. The subject must be the speaker I. (A bad mood cannot walk in a park.)
Walking in the park, I felt my bad mood disappear.Feeling tired after the journey, I went to bed early.
I felt tired after the journey (active), so I went to bed early.
Irritated by the noise, he closed the window.
He was irritated by the noise (passive), so he closed the windows.
Having walked for nearly an hour, we decided to stop for a rest.
Walking for an hour, we stopped for rest, sounds odd.
Having seen the film, I can say it's rubbish.
Having finished her university course, she decided to travel.

Time: Having finished dinner, I went for a walk.
When I'd had finished dinner, I went for a walk. Reason: Frightened by the loud noise, the dog ran away.
The dog was frightened by the loud noise, so it ran away. Condition: Seen from Linda's perspective, it's a good idea.
If it is seen from Linda's perspective, it's a good idea. Results: She fell over, twisting her ankle.
She fell over and as a result twisted her ankle.

Relative clauses, especially those in the passive, past continuous or present continuous tenses can often be reduced to participle clauses: I spoke to an old man who was sitting under a tree.
I spoke to an old man sitting under a tree. A man who was arrested for shoplifting earlier today has been charged.
A man arrested for shoplifting earlier today has been charged.

Participle clauses are often used in storytelling, especially in written forms such as novels. Taking out his pipe, Holmes put some tobacco in the bowl and struck a match.
Having succeeded in lighting the pipe, he took several deep puffs.
Speaking at a press conference earlier today, the president said he was looking forward to his trip to China.Scientists working at the International Space Station have released a report highlighting the dangers of large meteorites.Stressing the importance of international trade, the minister said the new deal would bring further prosperity to both countries.
Participle clauses, especially short explanatory ones, are sometimes used in conversation:
Seeing you're busy, I'll come back later.
Having seen the house, what do you think?
Possibly not. Participle clauses are less common than adverbial clauses with conjunctions. However, advanced students should be able to recognise them, especially as they are commonly found in written texts.