YOU SAID:

I didn't know that the cat was under the bed!

INTO JAPANESE

私はベッドの下に猫がいたことを知らなかった!

BACK INTO ENGLISH

I did not know that there is a cat under the bed!

INTO JAPANESE

ベッドの下に猫があるとは知りませんでした!

BACK INTO ENGLISH

I did not know there is a cat under the bed!

INTO JAPANESE

ベッドの下に猫がいるとは知りませんでした!

BACK INTO ENGLISH

I didn't have a cat under the bed!

INTO JAPANESE

ベッドの下に猫がなかった!

BACK INTO ENGLISH

Did not have the cat under the bed!

INTO JAPANESE

ベッドの下に猫を持っていなかった!

BACK INTO ENGLISH

Did not have the cat under the bed!