Question

Fill in the blank with the correct option:
“If she ______ harder, she would have succeeded.”

• A. studies
• B. studied
• C. had studied
• D. has studied

Hint:

Think of it as a past balancing scale: If you spot "would have" on one side of the sentence, you almost always need "had" on the other side!

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This sentence belongs to the Third Conditional category. Third conditional sentences are used to express hypothetical situations in the past—events that did not happen, along with their imaginary results.

Step 2: Key Formula or Approach:
The standard structural formula for a Third Conditional sentence is: $$\text{If + Past Perfect Clause (had + $V_3$)}, \dots \text{would have + Past Participle ($V_3$)}$$

Step 3: Detailed Explanation:
The result clause is explicitly given as "\dots she would have succeeded" ($\text{would have} + V_3$). Following the conditional rule, the conditional "if" clause must take a verb phrase in the past perfect tense. Among the given choices, only had studied satisfies the past perfect requirement ($\text{had} + V_3$). Choosing "studies" (present), "studied" (simple past), or "has studied" (present perfect) breaks the structural logic of this conditional structure.

Step 4: Final Answer:
The complete grammatically correct sentence is: “If she had studied harder, she would have succeeded.”