You've two choices with Walking. It's either a present participle or a gerund.Originally Posted by Noego
If participle, its function is adjectival and it heads a clause that modifies a (pro)noun somewhere in the sentence. Does Walking fit that definition?
If gerund, its function is nominal, which means it has one of three functions in the sentence: (i) it's a subject and agrees in person and number with a verb, (ii) it's an the object of a verb or (iii) it's the object of a preposition. Does Walking fill one of those structural positions?
OK, but what's its form and what's its function? Take a look at where it's sitting in the sentence. Does it belong to a major class? If not, does it modify anything? If not, does it connect anything?Originally Posted by Noego
There's the term substantive, meaning substitutes for, but the term adjective is fine.Originally Posted by Noego
It links two verb phrases (VPs), like this,Originally Posted by Noego
[VP slowly pushed opened the glass door] and [VP hobbled down the nearest aisle]
All the best.