YOU SAID:

I just ate a chair which was on the roof while I was high

INTO JAPANESE

私はハイになっている間、屋根上にあった椅子を食べた

BACK INTO ENGLISH

I was on the roof in the high chair to eat

INTO JAPANESE

私は食べるために高い椅子で屋根の上だった

BACK INTO ENGLISH

Eat my high chair was on the roof

INTO JAPANESE

食べる私のハイチェアは屋根の上

BACK INTO ENGLISH

Eat my high chair is on the roof.

INTO JAPANESE

食べる私のハイチェアは屋根の上。

BACK INTO ENGLISH

Eat my high chair is on the roof.