09. AE3. Modal Verbs for Speculation Quiz-Advanced REview

Which of the following is used to express strong certainty in the present based on logical deduction?

• Might

• Must

• Could

Which modal verb is not appropriate to express probability in a question and cannot be used in 2nd/3rd conditional sentences?

• Might

• Could

• May

Which modal expresses the least certainty about a future event?

• Will

• Might

• Must

What is the difference between can and may in speculation?

• Can expresses probability, may expresses ability.

• May expresses probability, can expresses what is generally true.

• Both are used for speculation in the same way.

Which of these is grammatically correct when speculating about the past?

• She can go already.

• She must have gone already.

• She will have go already.

Which modal verb cannot be used to speculate about a future possibility in the negative form?

• Could not

• Might not

• May not

What does "They really should be here by now" imply?

• You are completely certain they're here.

• You think they're here because it's logical.

• You believe they are late based on current time and expectations.

The lights are off and there's no car outside. She ___ be at home.

• must

• can't

• could

That ___ be your brother at the door - he said he was coming around this time.

• can

• will

• may

I don't know what happened to them. They ___ have taken a different route - they're still not here.

• may

• must

• will