1 After he finished his homework,he went out to play.
=Having finished his homework,he went out to play.
2 Because they were blind,how could they know what the elephant looks like?
=Being blind,how could they know what the elephant looks like?
3 If you are travelling north,you must change at Leeds.
=Travelling north,you must change at Leeds
4 Though he admitted that he had received the stolen jewellery,he denied(否认）having taken part in the robbery.
=Admitting that he had received the stolen jewellery,he denied(否认)having taken part in the robbery.
5 If weather permits,I’ll go there on foot.
=Weather permitting,I’ll go there on foot.