Помогите плиз закончить предложения на англ.яз. Unless i have time... I could be fitter if... I had been more careful if... I would ask my friends' help if... Надо о себе. Заранее спасибо

Unless I have time, I won't help you. I could be fitter if I did some excersise. I would have been more careful if had been aware of the danger. I would ask my friends' help if I needed it.