A semicolon (;) joins two complete sentences that are closely linked in meaning. They can be used instead of a full stop between related sentences, or instead of a conjunction like 'and' or 'but'. I ...

Modal verbs are verbs that indicate likelihood, ability, permission or obligation.

All hounds howl at night. Anyone who has any cats will not have any mice. Light sleepers do not have anything which howls at night. John has either a cat or a hound. (Conclusion) If John is a light ...