更多能源动词理论， more on modals

So, negation and progation with the modals 想 and 要


你想什么 = Correct, where 想 means to think, not want.
我不（在）想什么。 I'm not thinking about anything. = Correct.


Positive:

我想那个。 = Incorrect.
我要那个。 = Correct.
我想要那个。 = Correct.

我想去上海。 =Correct.

Negative：

你想去上海吗
我不要去 = Incorrect
应该-我不想去。

你要去上海吗? (Are you going to Shanghai? 或 Do you want to go to Shanghai?)
我不要去。 Incorrect.
应该 我不想去 = I don't want to go.
或 我不去。 = I'm not going.

Child's play.

Childspeak differs on this account. Differentiation of objects into classes such as nouns and 'verbs' is less developed.

Child:

1. 你要这块糖果吗？
2. 我不要啦！

3. 你要去看看你的新的爸爸吗？
4. 我不要（去）！

大人会说第四句不正确，只有孩子能这样说话。