When the subject of a sentence isn't doing something, the verb is passive. On the other hand, a sentence is active when the subject performs the verb (action). For example, in this sentence the verb ...

Picture a small child saying: "Can’t, shan’t, won’t!" They are using modal verbs to show their feelings and attitude to something. Maybe they are refusing to go to bed or eat their peas. Modal verbs ...

The reason is verbs in the singular third-person subjunctive ignore the subject-verb agreement rule. They drop the "-s" or "-es" at their tail ends and take the base form of the verb (the verb's ...