Fix the mistake: Subjunctive Mood: Advanced Applications

Past Perfect Subjunctive

This expresses a supposition contrary to a past fact: “If only ~ had happened then, ~ would have happened.” Be sure to distinguish its form from the past subjunctive.

Basic Rules

If + subject + had + past participle, subject + would/could/might have + past participle
“If I had studied harder, I would have passed the exam.” (If I had studied harder, I would have passed.)
← In reality: “I did not study very hard → I failed the exam” (opposite to the past fact)
Comparison with the past subjunctive:
- Past subjunctive: If + S + past tense, S + would + base verb (unreal present or future)
- Past perfect subjunctive: If + S + had + p.p., S + would have + p.p. (unreal past)

Example Sentences
If she had taken the medicine, she would have recovered sooner. (If she had taken the medicine, she would have recovered sooner.)
If I hadn't helped him, he couldn't have finished the project. (If I had not helped him, he would not have been able to finish the project.)

Points to Note

① The form had + p.p.: “× If I had have studied” is incorrect (the double have in had have is not allowed).
② Inversion (omitting if): Had + S + p.p. word order. “Had I studied harder, I would have passed.”
③ Negative past perfect subjunctive: hadn't (had not). “If he hadn't been late, we wouldn't have missed the train.”

Key Points
  • If + S + had + p.p., S + would have + p.p.
  • A supposition contrary to a past fact (in reality, ~ did not happen / could not happen)
  • Inverted form: Had S + p.p., ... (= If S had + p.p., ...)
  • could/might have p.p.: might have been able to ~

Practice

  1. Translate “If I had gotten up earlier, I could have caught the train” using the past perfect subjunctive.
  2. Rewrite the following in inverted form: If she had known the truth, she would have acted differently.
  3. Explain the actual situation indicated by the following sentence: If I had been more careful, I wouldn't have made that mistake.

English (Grade 12): related lessons