我从未改变，英语怎么说

I have never changed.
I will never change.

翻译不必拘泥字句,你完全可以套用广告,I AM WHAT I AM，这样效果好多了

I'am always who I am.

Never have I changed.
I am still myself.

1.I never have changed
2.I never being changed.

I have never changed