The police are not corrupt. If the police ____________________ (be) corrupt, they ____________________ (let) him leave the country.

4. had / would not have woken (Note: Strictly speaking, this mixes 2nd and 3rd. For a pure 2nd Conditional regarding a present ability: If the thief had a silencer, the noise would not wake the caretaker. OR If referring to that specific past night: If the thief had had a silencer... — See note below. ) Correction for standard Second Conditional (Present unreal): If the thief had a silencer, the noise would not wake the caretaker. 5. were / would know (Second Conditional: Present unreal). 6. were / would let (Second Conditional: Present unreal).

1 – First 2 – Second 3 – Zero 4 – Third 5 – Zero 6 – First 7 – Third 8 – Second

Analyze the mistakes made that night. These are regrets or hypothetical outcomes based on past events that cannot be changed.

He was caught. If he ____________________ (plan) the heist better, he ____________________ (succeed).

Complete sentence stems like "If I could go back in time, I would..." to practice the second conditional. Advanced Challenges: Mixed Conditionals FCE Use of English: Key Word Transformation | PDF - Scribd

(Answers will vary – check that verb tenses match the rules above.)