The -ing form can be used as a noun. For example: "reading is my favorite activity in my spare time."
It can also be used as an adjective, for example: "That movie had a very surprising end".
The -ing form can also be used as a verb in the progressive or continuous tense, for example: "I am watching TV now." (I am watching TV at this moment). Or: "I was waiting for him, when she told me he would not come to the party." (The action of waiting was in the past, when I heard he would not come to the party).
"I HAVE TOLD YOU THESE THINGS, SO THAT IN ME YOU MAY HAVE PEACE. IN THIS WORLD, YOU WILL HAVE TROUBLE. BUT TAKE HEART! I HAVE OVERCOME THE WORLD" - John 16:33