Work in pairs. Ask your partner if you can/could / may:

come in, sit down, open the window, water flowers, use his / her book, help him/ her, switch on/ off video (MP3 player, TV), borrow his / her rubber, go out, close the door
Example: Can I...? - Yes, of course. Could you ...? - No, I'm afraid not. May I...? - Sure

First Conditional - Реальные события.
1. If you´re late again, you _will (have) problems with the boss.
2. Do you think I will (lose) weight if I eat fewer cakes?
3. If you (continue) driving like that you will (get) a fine.
Second Conditional - Вымышленные события.
3. I would go to Rome next summer if you  (came) with me.
4. We could go to the countryside and have a picnic if the weather was nice.
5. What _would you (do) if you  (found) 500 euros on the street?
6. If I (were) you, I would (try) to take things easy.

1 I have drunk 4 cups of coffe today.
2 I haven't eaten anything since breafast.
3 I haven't seen him this morning.
4 I have never met his mother.
5 This is the first time I've driven a car.
6 I haven't played chess for ages.
7 I have met a lot of people in the last few days.
8 She has painted the ceiling.
9 I have repaired the car.
10 They have written 10 letters today.
11 He has saved a lot of money.
12 He has read 53 pages so far.
13 I've known about it for a long time.
14 He hasn't cought any fish.
15 It has bought a new house.

Как-то так