After each of the following sentences, a list of possible interpretations of the sentence is given. Choose the…

Analyze the question: The sentence "I would have visited you but for my father's ill health" is a third conditional structure. "But for" means "if it had not been for."

Explain the concept:

• "But for X, I would have done Y" means that X stopped Y from happening.
• Unpacked: If it had not been for my father's ill health, I would have visited you.
• This tells us two facts: (1) the father was ill, and (2) the speaker did not visit because of it.

Step-by-step solution:

• A. "Father's ill health would have made me visit you" is wrong. The ill health is the reason for not visiting, not for visiting.
• B. "Father's ill health prevented me from visiting you" is correct. The illness was the obstacle, so the visit did not happen.
• C. "Father threatened to fall ill if I visited" is wrong. Nothing in the sentence suggests a threat.
• D. "Father did not fall ill, so I couldn't visit" is wrong. This contradicts the sentence, because the father was ill.

Answer: B

Tip: Treat "but for" as "without" or "if not for." Whatever follows "but for" is the thing that blocked the action. The same idea appears in sentences like "But for the rain, we would have played the match," which means the rain prevented the match.