Students will be able to
- understand the difference between the use of modal verbs have/has to and must and which is appropriate for different situations,
- use the modal verb must and its negative form must not/mustn’t to give strong advice,
- use the modal verb must not/mustn’t to express prohibition,
- use the modal verb have to/has to to talk about rules and for something important or necessary,
- use the modal verb have to/has to in its negative form when something isn’t important, lacks necessity or that is okay not to do it.
- use had to (the past of have to, has to, and must) to express necessity in the past.