Gerund

In English the gerund is identical in form to the present participle (ending in -ing) and can behave as a verb within a clause (so that it may be modified by an adverb or have an object), but the clause as a whole (sometimes consisting only of one word, the gerund) acts as a noun within the larger sentence. For example: Editing this article is very easy. In the phrase "Editing this article," (although this is traditionally known as a phrase, it is referred to as a non-finite clause in modern linguistics) the word "Editing" behaves as a verb; the phrase "this article" is the object of that verb. But the whole phrase "Editing this article" acts as a noun within the sentence as a whole; it is the subject of the verb "is."