The document discusses modal verbs that express ability, possibility, and permission. It provides examples of modal verbs like can, be able to, could, must, might, may, and examples of their uses in sentences related to ability, possibility, and permission. It also includes exercises for the reader to practice using modal verbs in sentences correctly.

1. Modals of :Ability / Possibility / Permission

2. Modal VerbsModal verbs are helping / auxiliary verbs that express ideas of:ability

3. possibility

4. permission1- Modals for AbilityUse can, be able toand could to show that someone has (or doesn’t have) an ability to do something.The verbs after the modals of ability are always in the simple form.Alan can swim well.

5. Shaun was able to complete the assignment.

6. Paul could speak Chinese when he was a child.2- Modals for PossibilityThe verbs must, might / mayand could show possibility now and in the future. Use 'must‘ when you are 100% (or almost 100%) sure that something is the case.Use 'might‘ or 'may' for an opinion that has a good possibility of being true.Use 'could' to express a possibility which is one of many chances.

7. 3- Modals for PermissionWe use may, could and can to ask for and give permission. It will depend on the formality. They are placed at the beginning of the question.