A modal verb is a type of auxiliary verb that is used to indicate modality that is likelihood, ability, permission, and obligation. Common modal verbs include: can / could, may / might, must, will / would, and shall / should. Modal verbs tend to precede another verb. Modals do not have subject-verb agreement. They are used to indicate modality. It is important to learn the unique aspects of modal verbs and how they function within the context of a sentence.
Look at the following examples carefully and note how modal auxiliary verbs are used in sentences.