Question

What is a verb form ending in -ing and used as a noun.?

Answer 1

It is a gerund.  A noun derived from a verb.  Ex. the word "singing" We enjoyed the choirs singing. 

Answer 2

Answer:

ing forms can be used as a verbs,nouns,adverbs or adjectivesabbat

Explanation:

eg:

verb...the baby is smiling at his mother

smiling =continuous form of verb smile

Noun....smiling uses 12 facial muscles so they say

=something done as the subject before the verb.