Ответ:
2. Ian couldn't ride a bike two years ago. He can't ride a bike now. He will be able to ride a bike when he is five.
3. Ian couldn't read two years ago. He can't read now. He won't be able to read when he is five.
4. Ian couldn't write two years ago. He can't write now. He will be able to write when he is five.
5. Ian couldn't swim two years ago. He can't swim now. He will be able to swim when he is five.