1. Ability
1.1. Can
1.1.1. Example
1.1.1.1. I can speak english
1.2. In past or future
1.2.1. Could
1.2.1.1. Example
1.2.1.1.1. Tony could swim when he was six.
2. Determination
2.1. Shall
2.1.1. Example
2.1.1.1. I shall be released
2.2. Will
2.2.1. Example
2.2.1.1. I will buy this house next year
3. Permission
3.1. May
3.1.1. Example
3.1.1.1. May I use your dictionary?
4. Advice
4.1. Should
4.1.1. You should visit the doctor netx week
4.2. Moral duty / Advice
4.2.1. Ought to
4.2.1.1. Example
4.2.1.1.1. She ought to pass the exam.
5. Prediction
5.1. Will
5.1.1. Example
5.1.1.1. It will rain with this weather
6. Probability Range
6.1. Certainty
6.1.1. Will must
6.1.1.1. Example
6.1.1.1.1. I will must be the winner
6.2. Possibility
6.2.1. May
6.2.1.1. Example
6.2.1.1.1. I may stay at home or I may go to a disco.
6.2.2. Might
6.2.2.1. Example
6.2.2.1.1. Be careful. You might burn yourself.
7. Conditional Future
7.1. Would
7.1.1. Example
7.1.1.1. I would pass this curse, for sure
8. Acceptance
8.1. Will
8.1.1. Example
8.1.1.1. I will do my homework tomorrow
9. Obligation
9.1. Must
9.1.1. Example
9.1.1.1. You must keep your room tidy.
9.2. Have to
9.2.1. Example
9.2.1.1. You have to drive on the right in the USA.
9.3. Not obligation
9.3.1. Need not
9.3.1.1. Example
9.3.1.1.1. We have milk, you needn't buy any