Step 1: Reversing the Conditional Formula:
In this question, we apply the inverse of the rule from subpart (d). We want to replace the negative conditional “if you do not” with the word “unless.”
Step 2: Removing the Negative Auxiliary:
Since “unless” already contains a negative meaning (“if not”), we must remove the negative auxiliary “do not” from the conditional clause. This leaves us with the positive verb form: “Unless you study hard...”
Step 3: Finalizing the Structure:
Combining this with the main clause (which remains unchanged to preserve meaning) gives us: “Unless you study hard, you will fail.”