Gerund as Subject :
* Smoking is dangerous
* Writing is my hobby
* Swimming is a good sport
Gerund as Object :
* I don't like fishing
* She likes singing
* She likes dancing
Gerund as Complements
* Her job is sorting the mail
* My hobby is climbing
Gerund after Prepositions
* Are you interested in collecting stamps?
* I am sorry for coming late
* Before eating,you should pray first
* On opening the window,I saw the wind was blowing quickly
* I will inform you after finding the result
If Preposition "To" begain the word bellow (advance to, confess to, object to, dedicated to, to be used to, get used to, to be accustomed to, key to, look forward to, to be opposed to, must be use gerund
* This is dedicated to respecting his many service
* John confessed to stealing the money
* She objects to accepting his love
To be continued