其实这里would have to do 和 would do 是一样的句型.都是 would 后加动词原型,即would do sth. 只不过would have to do是把 would do sth(表“将来“) 与 have to do sth(不得不做某事)结合起来了.表达一种“在将来不得不去做某事”的意思.He would go into debt 则纯粹表示将来的一种不确定的结果. will do和would do区别在于前者可能性较大且发生在现在,后者可能性较小且有可能发生在过去,是过去将来时. 哪儿没看明白接着问.