I think it would be " Estaba montando en mi bicicleta cuando me caí y me rompí el brazo." But I'm not 100% sure. I hope this helps! ^-^
Answer:
So first are you learning mexico Spanish or Españas Spanish if you learning Mexico’s Spanish it would be letter b°
I hope I could help you can you pls give this answer a hart thx
First estas has to have an accent it needs to be estás
I think that is it
es
esta
estan
Explanation: