What is the main function of modal verbs?

• To indicate past tense actions.

• To express ability, necessity, or permission.

• To express ability, necessity, permission, or probability.

• To form continuous verb tenses.

Which of the following modal verbs expresses a strong obligation?

• May

• Must

• Could

• Have to

What is the difference between "must" and "have to" in terms of obligation?

• "Must" is used for external obligations, while "have to" is for personal necessity.

• "Must" expresses a stronger obligation than "have to."

• "Must" is often used for personal obligations, while "have to" is for external requirements.

• There is no difference; they are interchangeable.

Which modal perfect expresses that it wasn't necessary to do something?

• Could have

• Must have

• Should have

• Needn't have

What is the correct use of "needn't have + past participle"?

• To express a necessary action that was completed.

• To indicate that something was unnecessary but was done anyway.

• To show certainty about a past action.

• To make a polite request in the past.

Indicate the use of the modal in the following sentence:

You must have a driver's licence in order to drive.

• Obligation

• Ability

• Advice

• Possibility

Indicate the use of the modal in the following sentence:

Can Gerry speak French?

• Obligation

• Ability

• Advice

• Possibility

Indicate the use of the modal in the following sentence:

Jim should apologise to Terry. He was very rude.

• Obligation

• Ability

• Advice

• Possibility

Indicate the use of the modal in the following sentence:

We may have to change our plans.

• Obligation

• Ability

• Advice

• Possibility

Ryan couldn't come because he was ill.

• Obligation

• Advice

• Ability

• Possibility