Gerund is a verb + ing or v-ing.
Gerund is the shape look the same as the present participle, but acts differently, that is, present participle acts as predicative adjunct ' and ' adjectival form.
Gerund acts as a ' noun '
When a gerund gerund noun ' so as to act as follows:
1. use it as a subject of the sentence.
2. the use of a bupbot
3. use as a verb of vt
4. the use of the verb to be, to show the identity of the Chairman (comple-ment subjective)