Odie的英语课 983 Grammar | Conditional sentences 2

条件句分为：The zero conditional 0条件句The first conditional 第一条件句The second conditional 第二条件句The third conditional 第三条件句The zero conditional 0条件句If you heat ice, it melts.如果你加热冰，冰就会融化。melt 动词，融化，熔化，溶解= When you heat ice, it melts.当总是有这样的结果时，我们就叫0条件句。0条件句中的 if 可以用 when 替换。0条件句的主句和从句的时态通常都是一般现在时。0条件句的主句就没有 will，can 等情态动词。If I can't sleep, I listen to the radio. 如果我睡不着，我就听收音机。= When I can't sleep, I listen to the radio.