starve to death与be starve to death

starve to death与be starve to death
其实我最想明白的是为什么一下都不是被动语态：It knows it must outrun the slowest gazelle or it will starve to death.
他知道他必须要跑得比最慢的羚羊快,否则他就会饿死；
Those animals would starve to death,which means that the animals that eat them would starve as well.
这些动物会因饥饿死亡,意味着吃昆虫的动物会因饥饿死亡.
Women liar:You fool.If you don't do something .we will starve to death here.I don't want to die,you know!
女骗子：（一把推开男骗子）你这个笨蛋.再不找点事做我们就要饿死在这里了.我还不想死呢.