您好,翻译是：
After three days' training, I am able to ride (a/my) bike/bicycle (now).
祝你开心
望采纳谢谢
再问： 可以用现在完成时吗？
再答： 用一般现在时即可，不需也不必用现在完成时
如果对您有帮助，请及时采纳谢谢
若还有疑问，欢迎追问
再问： 如果一定要用现在完成时呢？ 怎么翻译
再答： After three days' training, I've been able to ride (a/my) bike/bicycle.
After three days of training, I 've been able to ride (a/my) bike/bicycle.
After training for three days, I 've been able to ride (a/my) bike/bicycle.