YOU SAID:
i havent showered since 1969
INTO JAPANESE
私は1969年以来シャワーを浴びていません
BACK INTO ENGLISH
I have not taken a shower since 1969
INTO JAPANESE
1969年以来シャワーを浴びていません
BACK INTO ENGLISH
I haven't taken a shower since 1969
INTO JAPANESE
1969年以来シャワーを浴びていません
BACK INTO ENGLISH
I haven't taken a shower since 1969
That didn't even make that much sense in English.