1. Verbal nouns in -ing may take a direct or an indirect object if their meaning allows.

2. A verbal noun in -ing may take an adverbial modifier.

Speaking extemporaneously is good practice. [Here the verbal noun speaking is the simple subject; but it is modified by the adverb extemporaneously, precisely as if it were a verb.]

But verbal nouns in -ing, like other nouns, may be modified by adjectives.

Extemporaneous speaking is good practice.

3. To the verbal nouns being and having, past participles may be attached, so as to give the effect of voice and tense.

Such expressions are verbal noun-phrases.

350. Verbal nouns in -ing are similar in some of their constructions to infinitives used as nouns ([p. 135]).