What are three common root word endings of singular indefinite pronouns

At midnight thomas edison opened the door and continued his work, but to his surprise it was so late that he had to get some rest. but with his mind racing and his mind at sake he continued working. hours and hours went untill he got it. he had invented the worlds first lightbulb!

Love  because it leads to a deeper understanding of a story.

Ihate reading but i really liked this book called “deep,dark, and dangerous”. it’s a really good book

The answer to this is a