怎么分辨to do 的宾语

请问老师，我主要想搞清，to design 还是 to design on ？

下面两句什么对？

1.What body shape is underwear based to design on?

2.What body shape is underwear based to design ?

由于我记得 有 what to do 这种使用方法。

do的宾语就是what，

但在这，我不了解应该是 to design（on）的宾语是underwear 还是 what body shape？

1. What body shape is underwear based on to design on?

2. What body shape is underwear based on to design ?

——这两个都是错句。不要继续研究了，就根据我说的两个句子即可。

改正方法为：

1. What body shape is underwear designed on?

结构：be designed on...（内衣）依据...而设计。

2. What body shape is the design of underwear based on?

结构：be based on...（内衣设计）以...为基础。

这个问题，我上次给你解答过了。你用的是 What the kind of people 作主语，我改为：What body shape 作主语。