i always eat eggs（变否定）

想often,always等这样的词不能用完全的否定的，所以，1，2，3楼的都不能那样用，don't,never,都是完全否定，4楼的rarely,seldom还是可以的

I rarely/seldom/never eat eggs.

I don't always eat eggs

I seldom eat eggs.

I never eat eggs