VERB-ING functions:
1. Verb-ING word as a noun
2. Verb-ING word as an adjective
3.Verb-ING as a verb with the helping verb.
1. Verbing words funciton as nouns that denote an action.
EX: Growing plants IS my hobby.
Here growing is the verb-ing noun because the word acts as a noun and hence the subject of the clause, but it also denotes the action.
VERB-ING nouns is that they are always SINGULAR. Reading mystery books gives me thrill..
2.VERB-ING as an adjective.
Verb-ing words function as adjectives.here it provides extra information of a particular noun entity...When the verb-ing word acts as an adjective, it doesn't have bearing on the verb of the sentence.The verb must agree in number and makes sense with subject of the sentence.
ex: Growing plants in your backyard need more care..
Here growing is adjective that presents a characteristic of the plants...what kind of plants need more care ? The plants that are growing.
3.VERB-ing as a verb with a helping verb:
These verb-ing along with helping verbs function as verbs...
ex: I am growing banana plants in my farm...here growing is not able to tell the tense of the word but it is helping verb that tells the tense...
Hope it helps...