Question

Helen likes taking photos,too.Right?No,she doesn't . 为什么用doesn't 回答

问句里没有助动词，为什么后面要用助动词回答。

Answer 1

—Helen likes taking photos, too. Right?
—No,she doesn't .
通常，肯定句不需要在实意动词前加“do”，当然也有例外，那就是强调句中需要加上
如：Helen DOES like taking photos.
而否定句中要加上助动词。
所以回答中为：she doesn't.

其实回答为省略，完整为：she doesn't like taking photo. 因与上句重复，所以即使省略意思任然很清晰。

Answer 2

No，跟doesn't 是固定搭配
半疑问句相当于是“Does helen like ……？”

Answer 3

Helen likes taking photos,too.这句的谓语是likes，行为动词。只要是行为动词，对应的一般疑问句都用“助动词+动词”提问，而这里主语是人名，助动词要用第三人称单数does。还有什么不明白的地方吗？