would have had to和would have to的区别
来源这一句（原文背景是讲述古代壁画,都画在不见天日的黑暗洞穴里）：You would have had to make a special trip into the cave to make the paintings,and a special trip to go see it,and each time you'd have to bring along torches to light your way.
注意,would have to在句中被缩写了.它们有何区别?以该句为例,这种区别造成意思表达上的何种区别?