for不能少,否则a whole week不能做时间状语.你刷新一下也面，看补充问题不可以改成there have been raining for awhole week。因为在there be句型中，be动词不是一个动作动词，但可改为：The rain has been lasting for a whole week.介词for是“达/计....时间”a whole week为什么不能做时间状语a whole week是一个名词短语。只有副词或介词短语才可以修饰一个动词的时间，做其状语。如，你不能说；I studied English an hour.而要说：I studied English for an hour.