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?
