A present participle (-ing form)
A passive infinitive has a future meaning
An active infinitive
A prepositional phrase
An adjective phrase
An adverb or adverbial phrase
A past participle has a passive meaning
an easy concept to define
ads offering personal recommendations
the subject to be discussed
people happy to give away this information
applications programmed to monitor your messages
people on the other side of the world
the guy upstairs