1. Committing crimes are very bad.
2. He thinks this world is a virtual world.
3. She is did not noticed by her friend.

REMEMBER:
-Please remember to check how the word is used in the sentence. Is it use as a noun and as an adjective, for us to know if we are using them in a comprehensive manner.

Hi, Elsa!
Thank you so much for doing your homework. You did a great job with this one. See you!