A: You can correct my English grammar if there are any mistakes. B: I don't want to. 我不想 + 动词：I don't want to (+ verb) - 例如：我不想去 - I don't want to go; 你想去吗？ - Do you want to go?; 我不想 - I don't want to 我不想要 + 名词: I don't want + noun - 例如：我不想要这个玩具 - I don't want this toy; 我不想要这碗米饭 - I don't want this bowl of rice 上面的话B想表达的意思是，我不想纠正你的英语语法，但是因为A已经把事情说清楚了，B就不需要重复说一遍“纠正你的英语语法”，所以把“我不想纠正你的英语语法”缩短成"I don't want to." 因为他是不想做一件事情，而不是不想要一个东西，所以需要用 I don't want to。不过如果不想要一个东西的话，也不能说 I don't want，必须加一个名词或者代词，比如：I don't want ice cream, I don't want that, I don't want it， 等等。没有什么情况会说 I don't want的。

I don't want an apple. I don't want to eat an apple. I want help. I want to help you. The correct way is: want + noun want + to + verb

如果你后面省略的是我想做什么什么的话，就是 I don‘t want to 如果是一个名词的话 就是 I want to 所以还是看你隐藏意思中后面想说的是什么吧