我以前不会骑自行车用英语怎么说

"I didn't know how to ride a bicycle" 是表达 "我以前不会骑自行车" 的适当英文表达。

来源：这是一种常见的英语表达方式，用来表示某人以前不会某项技能。

英文例句：

"I used to struggle with riding a bike, but now I can do it with ease." (中文翻译：我过去不会骑自行车，但现在很容易就会了。)
"When I was younger, I didn't know how to ride a bicycle, but my dad taught me." (中文翻译：我年轻的时候不会骑自行车，但我爸爸教了我。)