Gerund or Present Participle?
Gerund (object of the preposition to after: sitting is a noun)
After sitting home all day, I was bored.
present participle (crying: verb)
Crying, Martha reached for a tissue.
present participle (beginning is a verb)
I am beginning to enjoy country music.
Gerund (singing: subject)
Singing has always helped Sarah relax.
Gerund (staring: subject)
Staring at people is rude.
present participle (riding is a verb)
The boy was riding home.
present participle (interesting is an adjective because it's describing the movie)
The class watched an interesting movie.
Working is a gerund (it's the subject which means it's a noun). Scorching is a present participle (scorching is an adjective describing the sun).
Working under the scorching sun is tiring. (there's 2! )