- Subjective Mood in Conditional Sentences
  - What is Subjective Mood?
    - Special form of verb
    - Expresses assumptions, guesses, or doubts
    - Not based on facts
  - How to Use Subjective Mood in Conditional Sentences
    - Assumptions contrary to facts
      - Contrary to the past
        - Example: If I had known his telephone number, I would have called him
      - Contrary to the present
        - Example: If I were you, I would study hard
      - Contrary to the future
        - Example: If it should rain tomorrow, we would call off the match
        - Example: If it were to rain tomorrow, we would call off the match
        - Example: If it rained tomorrow, we would call off the match
  - Usage of Conditional Sentences of Mixed Time
    - Conditions and main clauses occur at different times
    - Example: If you had followed my advice, you would be better now
    - Adjust verb forms based on specific time references
  - Summary of Key Points
    - Contrary to the past
      - Condition: If + subject + past perfect tense
      - Main clause: Subject + would/could/should/might + present perfect tense
    - Contrary to the present
      - Condition: If + subject + past tense
      - Main clause: Subject + would/could/should/might + base form of verb
    - Contrary to the future
      - Condition: If + subject + past tense / were to / should + base form of verb
      - Main clause: Subject + would/could/should/might + base form of verb
    - Mixed time conditionals
      - Adjust verb forms according to referenced time