YOU SAID:

Once upon a time a cat was sitting on a tree and a bird pood on it

INTO JAPANESE

かつて、猫が木の上に座っていて、鳥がそれに乗っていた

BACK INTO ENGLISH

Once a cat was sitting on a tree, a bird was on it

INTO JAPANESE

一度猫が木の上に座っていたら、鳥がそこにいました

BACK INTO ENGLISH

Once the cat was sitting on the tree, the bird was there

INTO JAPANESE

猫が木に座ったら、鳥がそこにいた

BACK INTO ENGLISH

When the cat sat on the tree, the bird was there

INTO JAPANESE

猫が木に座ったとき、鳥がそこにいた

BACK INTO ENGLISH

When a cat sat on a tree, the bird was there

INTO JAPANESE

猫が木の上に座ったとき、鳥はそこにいた

BACK INTO ENGLISH

When the cat sat on the tree, the bird was there

INTO JAPANESE

猫が木に座ったとき、鳥がそこにいた

BACK INTO ENGLISH

When a cat sat on a tree, the bird was there

INTO JAPANESE

猫が木の上に座ったとき、鳥はそこにいた