Question

Как можно сказать: 1)My btother's pen.2) The pen of my brother. и 3)???

Answer 1

1-потому что  ручка брата 

Answer 2

Либо 1 вариант, либо 2.  3 - нет

Answer 3

1) My brother's pen can be translated as ручка моего брата in Russian. This phrase indicates that the pen belongs to your brother.

2) The pen of my brother can be translated as ручка брата моего in Russian. This phrase also indicates that the pen belongs to your brother, but the word order is slightly different.

3) It seems that the third part of your question is missing. Could you please provide more information or clarify what you would like to know?

Please let me know if there is anything else I can help you with!