特殊疑问句.先将句子变为一般疑问句. 也就是有be 动词 be动词提前. 实意动词 借助助动词do/does/did 情态动词 情态动词提前 所以先变为 are there two paths in the forest? 然后对two 提问,对数量提问用特殊疑问词组 how many（可数名词）/how much （不可数名词）.同时注意要把名词放在how many/much之后 paths明显是可数名词 所以用how many 最后得出：How many paths are there in the forest?
