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结构︰What if+主词+动词 说明︰此句型意为如果的话怎么办呢?。但经常用于反语，有时也变成即使也没关系之意。 What if it is true? 如果这是真的又该如何呢? What if he doesnt agree? 如果他不同意该怎么办呢? What if he comes back now? 如果他现在回来怎么办? What if the boys parents should die? 如果那男孩的父母死了该怎么办呢? What if I fail! 即使我失败了又怎样! What ... for? 结构︰What+助动词+主词+动词+for? 说明︰此句型意为为什么?。相当于For what? What are you running for? 你为什么在跑步? What do you want it for? 你为什么要那个? What did they go there for? 他们为什么去那里? How else ...? 结构︰How else+助动词+主词+助动词? 说明︰此句型意为还有别的方法吗?。 How else should a father in this modern world express his affection and concern for his own son? 现代这个世界上，父亲还应该有别的方法来对自己的儿子表示爱护和关心吗? How else can the doctor save him? 医院还有别的方法可以救他吗? | 
