l never used to be afraid of flying,but l am now.这道题怎么翻译

问题描述:

l never used to be afraid of flying,but l am now.这道题怎么翻译
为什么填used to不填would或am used to

used to 是过去常常,am used to(do)是被动,am used to(doing)是习惯于
总不能说习惯恐惧吧
would表猜测或则过去式的将来时,这里不适用~