1) Choose the participle from the sentence.
2) Choose whether the participle is past or present
3) Then select the participial phrase if there is one.

Although he was strong, his aching back felt the burden he had lifted for so long.
lifted
aching
present
past
(aching back felt)
(lifted for so long.)

The amusing traveler decided to rent a room for the night.
past
(the amusing traveler)
amusing
present
(decided to rent a room)
decided​