P. is a non-finite form of the verb which has verbal, adjectival and adverbial features. It is formed by adding the suffix –ing to the stem of the verb. P.I is used:
a) to form the progressive aspect (F.e. We are working)
b) to modify a noun as an attribute (F.e. Let sleeping dogs lie)
c) to modify a phrase of sentence as an adv.mod. (F.e. Broadly speaking the project was a success).
The verbal ch-r of P.I is manifested morphologically in the categories of voice and perfect and syntactically in its combinability. Thus, like the other non-finites, it may combine: a) with a noun or pronoun as an object; b) with an adverb or prepositional phrase as an adv.mod.; c) wth a noun or adjective as a predicative. The adj. and adv. features of P.I are manifested in its syntactical functions as an attribute and an adv.mod.
