Modal Verbs
by Prince Philip
1. Prohibition
1.1. mustn´t
1.1.1. Project specifications
1.1.2. End User requirements
1.1.3. Action points sign-off
1.2. be banned
1.3. be prohibitted
2. Advice
2.1. should
2.2. ought to
3. Necessity
3.1. Need
3.2. needn´t
3.3. have to
3.4. don´t have to
4. Possibility
4.1. Can/Could
4.1.1. Ability
4.1.2. Permission
4.1.3. Deduction
4.2. might
4.2.1. Deduction
5. Obligation
5.1. must
5.2. have to
5.2.1. KPI's