Modal verbs are auxiliary verbs that express necessity, possibility, permission, or ability. Here are examples of sentences with modal verbs clearly indicated:
- She can swim very well. (Here, 'can' expresses ability.)
- You must finish your homework before playing. (In this case, 'must' indicates obligation.)
- He might come to the party later. ('Might' is used here to express possibility.)
- We should leave early to avoid traffic. (Here, 'should' suggests advice.)
- May I borrow your pen? ('Borrow' is combined with 'may' to ask for permission.)