8.129 present participle

You use a non-defining clause containing a subject and a present participle:

* when you want to mention something that is happening at the same time as the event or situation described in the main clause

• Her eyes glistening with tears, she stood up and asked the Council: 'What am I to do?'

* when you want to mention a fact that is relevant to the fact stated in the main clause.

• Bats are surprisingly long-lived creatures, some having a life-expectancy of around twenty years.

'With' is sometimes added at the beginning of the non-finite clause.

• The old man stood up with tears running down his face.