Spot the error in the following sentence.
A. If I had known
B. this before
C. I will have helped him.
D. No error.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → C
The correct sentence should be: C. I would have helped him.
Explanation for each option:
☀ A: There is no error in option A. The sentence is grammatically correct: "If I had known."
☀ B: There is no error in option B. The sentence is grammatically correct: "this before."
☀ C: The error is in option C. The correct phrase is "I would have helped him." When expressing a hypothetical situation in the past, the correct construction is "If + past perfect (had known), then + would + have + past participle (helped)."
☀ D: The statement "No error" is incorrect because the error is in option C, as explained above.