Condition Clauses: If, Unless, and Provided That

Condition clauses set the rules for when an action can or cannot happen. While if introduces a basic condition, unless means "if not" (e.g., The machine will break unless you clean it), and provided that emphasizes a strict requirement or condition (e.g., You can keep the pet provided that it stays quiet). Choosing the correct word is essential for making sure your sentence's logic makes sense!

In this challenge, you will apply these rules to a variety of entertaining scenarios. You'll help a time traveler avoid erasing history, assist a secret agent with vault alarms, review an eccentric professor's syllabus, and even sign a landlord's unusual pet llama agreement. Along the way, you will practice identifying equivalent statements, such as swapping unless for if not.

You'll work through 12 questions featuring a mix of single-choice, multi-choice, drop-down, and drag-and-drop formats.

Try the quiz to check your knowledge!