Answer:
Modal verbs help when speaking about ability, making requests and offers, asking permission, and more. The modal verbs in English differ from other verbs, because they are not used separately, and do not indicate a specific action or state, they just reflect its modality, the attitude of the speaker to the action. By using modal verbs, you're able to express nuances in meaning that you wouldn't be able to otherwise. They are used to show the level of possibility, indicate ability, show obligation or give permission. Modal verbs behave differently to 'ordinary' verbs.
Explanation:
