YOU SAID:
How was your day? Mine was boring.
INTO JAPANESE
あなたの一日はどうでした?私のはつまらないものでした。
BACK INTO ENGLISH
how was your day? My was boring.
INTO JAPANESE
あなたの一日はどうでした?私は退屈でした。
BACK INTO ENGLISH
how was your day? I was bored.
INTO JAPANESE
あなたの一日はどうでした?私は退屈していました。
BACK INTO ENGLISH
how was your day? I was bored.
That didn't even make that much sense in English.