Modals are different from normal verbs:
1: They don't use an 's' for the third person singular.2: They make questions by inversion ('she can go' becomes 'can she go?').3: They are followed directly by the infinitive of another verb (without 'to')
We use 'can' and 'could' to talk about a skill or ability.For example:
We can use verbs such as 'must' or 'should' to say when something is necessary or unnecessary, or to give advice.For example:
- Childrenmust dotheir homework.
- Youshould stopsmoking.
We can use verbs such as 'can', 'could' and 'may' to ask for and give permission. We also use modal verbs to say something is not allowed.For example:
We can use 'will' and 'would' to talk about habits or things we usually do, or did in the past. for example
