The Latin word gerundium He arrived in Spanish as gerund . This term is used in the field of grammar to name a impersonal form of the verb which, in our language, ends in -ndo .
Gerunds, depending on the context, can produce a verbal periphrasis or acquire character of adverb . Verbal periphrasis is a predicative unit that is formed by a personal auxiliary verb attached to a non-personal assisted verb. For example: "Grandpa is eating", "I've been thinking about it".
An adverb, meanwhile, is a word with tonic and invariable elements that usually have lexical meaning and that can modify the meaning of other words. The gerund with adverbial character alludes to Actions that developed during or before the action of the other verb: "Manuel entertains himself playing with his dolls" ("Entertain" and "to play" they develop simultaneously), “Striving hard, my daughter bought a house” (first be "Struggled" and later "I buy").
It can be said that one gerund obtains its personal and temporal reference from the other verb with which it appears. When the gerund is created by the gerund of to have and the participle of another verb that conjugates, speaks of compound gerund : "Having signed the contract, we should not have any inconvenience" ("Having signed" it is a compound gerund).
The Royal Spanish Academy (RAE ), on the other hand, recognizes in its dictionary the colloquial expression "What is gerund", used in Spain to encourage someone to immediately perform what the previous verb expresses in the form of a gerund: “Clarifying, which is gerund: tell me exactly what your mother has told you about me”.