The Forms of the Gerund

1. Active Voice

1.1. Indefinite Gerund

1.1.1. V+ing:

1.1.1.1. Running

1.1.1.2. Opening

1.2. Perfect Gerund

1.2.1. having V+ing:

1.2.1.1. Having running

1.2.1.2. having opening

2. Passive Voice

2.1. Indefinite Gerund

2.1.1. being V+ing:

2.1.1.1. being running

2.1.1.2. being opening

2.2. Perfect Gerund

2.2.1. having being running

2.2.2. having being opening