1. We won’t go because it is raining.
=> If
2. Susan feels sick because she eats cream cakes.
=> If
3. Without this treatment, the patient will die.
=> If
4. The people aren’t prepared to face the floods; therefore, the consequence is disastrous.
=> If
5. . We don’t act soon. We lose that forest in five years.
=> If
6. There is water and air. There is life on Earth. (Unless)