YOU SAID:
i mailed a letter yesterday
INTO JAPANESE
私は昨日手紙を出した
BACK INTO ENGLISH
I issued the letter yesterday
INTO JAPANESE
昨日手紙を出した
BACK INTO ENGLISH
Issued a letter yesterday
INTO JAPANESE
昨日手紙を出した
BACK INTO ENGLISH
Issued a letter yesterday
You've done this before, haven't you.