YOU SAID:
yesterday i walked my green dog for exactly 3 minutes
INTO JAPANESE
昨日私はちょうど3分間私の緑の犬を歩きました
BACK INTO ENGLISH
Yesterday I walked my green dog for just 3 minutes
INTO JAPANESE
昨日、私は緑色の犬をわずか3分間歩きました
BACK INTO ENGLISH
Yesterday I walked the green dog for only 3 minutes
INTO JAPANESE
昨日、私は緑色の犬をたった3分歩いた
BACK INTO ENGLISH
Yesterday I walked the green dog for only 3 minutes
That didn't even make that much sense in English.