YOU SAID:
I have to get my siblings off the bus
INTO JAPANESE
私は兄弟をバスから降りなければなりません
BACK INTO ENGLISH
I have to get my brother off the bus
INTO JAPANESE
私は弟をバスから降ろさなければならない
BACK INTO ENGLISH
I have to get my brother off the bus
Come on, you can do better than that.