这句英语的"If"该翻译为什么?是从句吗? If she spent five years in Paris,how come she can't speak a w

if译为：假如……，如果……

这里是虚拟条件句（状语从句了，就是与事实相反的假设。

If she spent five years in Paris,how come she can't speak a word of French？

如果她在巴黎过了5年，又怎么一句法语都不会说呢？