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Help the detective review her old case files. She is thinking about a bank robbery where the thief got away simply because the security guard took a nap!
Choose ALL the options that correctly complete her thought process using the third conditional.
"If the security guard hadn't fallen asleep, ________________"
The correct answers are the thief wouldn't have escaped so easily. and we could have caught the robbers red-handed.
The prompt provides the if-clause in the past perfect ("hadn't fallen asleep"). Therefore, the main clause needs a past modal structure: would/could/might + have + past participle.
"Didn't escape" is past simple. "Would caught" is missing the auxiliary have. "Wouldn't had" is incorrect because modals must be followed by the base form have, never had.