Question

Please help me to make sort message about situation "you use brother's bike because your bike is broken. you use his bike to go to the bookstore. you will go home at five this evening. write a message to your brother."

Answer 1

To, my brother
brother, i borrow your bike to bookstore, because my bike is broken, i will go to home at five this evening.
                                                                          from (your name)

Answer 2

"brother, can i use your bike? My bike is broken... so, i need this bike. i'm going to the bookstore and i will come back at 5 this evening! Thank you before, for lending me one!     - Your sister "