I have decided,and never changed.

问题描述:

I have decided,and never changed.
试分析,这个句子是否存在错误或是歧义?另外,这个句子可作何种解释?例如:A.I have decided,and I have never changed.B.I have decided,and it has never changed.C.I have decided,and it has never been changed.D.I have decided,and it will never been changed.诸如此类.
请具体说一下是怎样的歧义、语法错误、逻辑错误之类…

a 我已经决定了,而且我不曾改变.
b我已经决定了,而它也不曾有过改变
c我已经决定了,而且从来没有改变过.
d我已经决定了,而且也永远不会改变.
a和c是对的,因为两个动作都发生在过去且有时间先后.b和d语法错误,b改成 I have decided,and it has never been changed.d改成I have decided,and it will never be changed.