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Grammar IV Unit Review Chapter 10: Modals Part 2 (Degrees of Certainty:…
Grammar IV Unit Review
Chapter 10: Modals Part 2
Degrees of Certainty: Present Time
100% sure
He is sick.
95% sure
He must be sick.
50% sure or less
He may be sick.
He might be sick.
He could be sick.
Degrees of Certainty: Present Time Negative
100% sure
Sam isn't hungry.
95% sure
Sam must not be hungry.
99% sure
Sam couldn't be hungry.
Sam can't be hungry.
50% sure or less
Sam may not be hungry.
Sam might not be hungry.
Degrees of Certainty: Past Time
Past Time: Affirmative
95%
She must have been sick.
50% sure or less
She might have been sick.
She could have been sick
She may have been sick.
100%
She was sick
Past Time: Negative
99%
Sam couldn't have been hungry.
Sam can't have been hungry.
95%
Sam must not have been hungry.
100%
Sam wasn't hungry
50% sure or less
She may not have been hungry
She might not have been hungry
Degrees of certainty: Future Time
90% sure
Kay should do well on the test.
Kay ought to do well on the test.
50% sure or less
She may do well on the test.
She might do well on the test.
She could do well on the test.
100% sure
Kay will do well on the test.
Progressive Forms of Modals
Present Time: Modal+be+-ing
Past Time
Modal+have been+-ing