Multiple choice

You need to work really ________ if you want to be a success.

  1. hardly

  2. hard

  3. hardfully

  4. hardful

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The word "hard" functions as both an adjective and an adverb, meaning with great energy or effort. "Hardly" is a different adverb meaning scarcely or almost not, while "hardfully" and "hardful" are not real English words.