1. Permission
1.1. Can
1.1.1. Can I open the window? It's too hot in here.
1.2. May
1.2.1. May I ope the window? It's too hot in here
2. Request
2.1. Could
2.1.1. Could you carry this for me? I have too much to carry.
2.2. Would
2.2.1. Would you get me a newspaper when you go to shops please?
2.3. Will
2.3.1. Will you answer the phone please - I am busy
3. Confimation
3.1. Shall
3.1.1. Shall I get pizza dinner tonight?
3.1.2. I shall meet you ata the station alt 7pm
4. Possibility
4.1. Might
4.1.1. He might be in the office on tuesday - I'm not sure.
4.2. May
4.2.1. She may come to the meeting - She's not sure of her schedule at the moment.
4.3. Could
4.3.1. He could be on the fourth floor - He has a meeting there later
5. Deduction
5.1. Can't have
5.1.1. He can't have been at work on Tuesday - I saw him at the stadium.
5.2. Must Have
5.2.1. He must have been in the office - His car was there.
6. Offer
6.1. Will
6.1.1. I'll drive you to the station if you want.
7. You can either take the bus or the metro.
8. Obligation
8.1. Must
8.1.1. You must wear a crash helmet on a motorbike - It is the law
8.2. Must Not
8.2.1. You mustn't get on a train without a valid ticket.
8.3. Have to
8.3.1. You have to stamp your ticket when you get on a bus in Rome.
9. Prohibition
9.1. Cannot
9.1.1. You can't drive a car without a license.
10. Choice
10.1. Can
10.1.1. You can either take the bus or the metro.
10.2. Could
10.2.1. You could take a taxi if you are in a hurry.
11. Suggestion
11.1. Should
11.1.1. You should see a dentist if you have a tootache.
11.2. Should not
11.2.1. You shouln't drink alcohol if you are going to drive.
11.3. Ought to
11.3.1. You ought to phone your mother on her bithday - It's a good idea.
11.4. Ought Not to
11.4.1. You ought not go out in the rain if you don't have an umbrella - It's a bad idea
12. Ability
12.1. Can
12.1.1. I can ride a horse - I had lessons when I was child.
12.2. Cannot
12.2.1. I can't swim - In fact I am terrified od water.
12.3. Could
12.3.1. I could speak Danish when I was a child.
12.4. Could not
12.4.1. I couldn't drive a car until I had lots of lessons.