Zero Conditional: If you heat ice, it melts., If you mix red and yellow, you get orange., If you heat water to 100 degrees Celsius, it boils., If you drop a ball, it falls to the ground., If you cut an apple and leave it out, it turns brown., First Conditional: If she studies harder, she'll pass the exam., If I have time, I will call you later., If they arrive early, we can have dinner together., If it rains tomorrow, I will bring an umbrella., If it's sunny, I go for a walk in the park.,

Zero and First Conditional

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