In English, does "worth" function as an adjective or a preposition? Why is the word followed by a V-ing form? (This book is worth reading.)
Thanks for responding to my question!!
This book is worth reading.
"Worth" is an adjective here. Adjectives generally cannot have -ing clauses as complement. But "worth" is an exception. Consider also:
It's an idea worth considering.
His story is worth checking out.
Note that "worth" can also be a noun in examples like A dollar's worth of chocolates and You should make an estimate of your net worth.
But "worth" is never a preposition.
Thank you, Paul!