YOU SAID:
Yesterday upon the stair I met a man who wasn't there.
INTO JAPANESE
昨日階段の時に私はそこにいなかった人に会った。
BACK INTO ENGLISH
Yesterday on the stairs I met who wasn't there.
INTO JAPANESE
昨日階段で私はそこにいなかった人に会った。
BACK INTO ENGLISH
Yesterday on the stairs I met who wasn't there.
You've done this before, haven't you.