YOU SAID:

It was that red box that I found in front of the door yesterday.

INTO JAPANESE

それは私が昨日ドアの前に見られる赤いボックスでした。

BACK INTO ENGLISH

It was a red box that I have seen in front of the door yesterday.

INTO JAPANESE

それは私が昨日ドアの前で見てきた赤い箱でした。

BACK INTO ENGLISH

It was a red box that I have seen in front of the door yesterday.