The sentence is not grammatical.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Farooq Abbasihow come it is not grammatical?There is no word in the sentence that admits a to preposition phrase. As a modifier, contribution can’t take a to phrase, but it can in a context such as the one GPY suggested.
Farooq AbbasiI am only confused here about the GRAMMAR of "to plus -ing" here not the whole text or sentence.It is hard to explain the grammar when the sentence is ungrammatical!