I think he can eat an egg!改为否定句为什么是I don't think.

网友回答

主句是I think.
he can eat an egg,只是从句,前面省略了引导词that.
将句子改为否定句,自然是改主句,而不是从句,所以要改为I don't think.
======以下答案可供参考======
供参考答案1:
I don't think ...是固定搭配,我不认为。。。。