YOU SAID:

In three days, I will have been walking for ninety days straight.

INTO JAPANESE

3日後、私は90日間まっすぐ歩いているでしょう。

BACK INTO ENGLISH

Three days later, I will be walking straight for 90 days.

INTO JAPANESE

3日後、私は90日間まっすぐ歩きます。

BACK INTO ENGLISH

After three days, I will walk straight for 90 days.

INTO JAPANESE

3日後、私は90日間まっすぐ歩きます。

BACK INTO ENGLISH

After three days, I will walk straight for 90 days.