YOU SAID:
I crashed my brothers car yesterday
INTO JAPANESE
昨日兄弟の車を衝突させました
BACK INTO ENGLISH
I crashed my brother's car yesterday
INTO JAPANESE
昨日、兄の車をぶつけてしまいました
BACK INTO ENGLISH
I hit my brother's car yesterday
INTO JAPANESE
昨日兄の車にぶつけてしまいました
BACK INTO ENGLISH
I hit my brother's car yesterday
This is a real translation party!