14. He doesn't learn hard. He fails his exams
15. I'm too poor to take a space trip
16. I don't have a car, so I can't drive you to the airport
17. Nam is too young, so he can't take part in the project to be trained to become an astronaut
19. We haven't got any matches, so we can't light a fire
20. He doesn't help me, possibly because I never ask him for help
21. I don't know his address, so I can't write to him
22. You work too fast, that's why you make so many mistakes
23. I don't have a map, so I can't direct you
24. English people speak very quickly. Perhaps that's why I can understand them
25. I live near my office, so I don't spend much time traveling to work
14. He doesn't learn hard. He fails his exams
=> He would pass the exam if he learned hard
15. I'm too poor to take a space trip
=> i'm not rich enough to take a space trip
16. I don't have a car, so I can't drive you to the airport
=> if i had a car, i could drive you to the airport
17. Nam is too young, so he can't take part in the project to be trained to become an astronaut
=> nam can’t take part in training to become an astronaut because he is too young
19. We haven't got any matches, so we can't light a fire
=> If we had got some matches, we could light a fire
20. He doesn't help me, possibly because I never ask him for help
=> If I asked him for help, he would help me
21. I don't know his address, so I can't write to him
=> if i knew his address, i could write to him
22. You work too fast, that's why you make so many mistakes
=> if you didn't work too fast, you wouldn't make so many mistakes
23. I don't have a map, so I can't direct you
=> if i had a map, i could direct you
24. English people speak very quickly. Perhaps that's why I can understand them
=> If English people didn't speak quickly, I could understand them
25. I live near my office, so I don't spend much time traveling to work
=> if i didn't live near my office, i would spend much time traveling to work
