U have a lot of strwngerh
First, you find the simple subject and simple predicate.
If the '-ing' form of the verb is not part of the simple predicate, then determine how it is used in the sentence. If it's in a noun position, then it's a gerund. If it is used as an adjective, then it will be a participle.
Cassius asks Pindarus to kill him with his own sword; Brutus runs onto his own sword, which is held by Strato.
The prince should avoid the Control Freaks