Modals of deduction in the past (e.g., must have , couldn't have ) used to discuss mysteries like the Mary Celeste.
Provides a direct preview of the Unit 10 key for quick reference. Modals of deduction in the past (e
. Below is a summary of the core sections and answer keys based on available test versions. Grammar: Modals of Deduction & Probability Modals of deduction in the past (e