YOU SAID:

Yesterday in two days I will have turned eighteen two weeks past last week.

INTO JAPANESE

昨日二週間で、私は先週2週間過ぎて18歳になったでしょう。

BACK INTO ENGLISH

Yesterday in two weeks, I will have been 18 years past two weeks last week.

INTO JAPANESE

昨日の2週間で、私は先週2週間、過去18年間になります。

BACK INTO ENGLISH

In the last two weeks, I will be the last 18 weeks, last week 2 weeks.

INTO JAPANESE

最後の2週間で、私は最後の18週間、先週の2週間になります。

BACK INTO ENGLISH

In the last 2 weeks, I will be the last 18 weeks, last week 2 weeks.

INTO JAPANESE

最後の2週間で、私は最後の18週間、先週の2週間になります。

BACK INTO ENGLISH

In the last 2 weeks, I will be the last 18 weeks, last week 2 weeks.