YOU SAID:

I think someone stole the last piece of cake

INTO JAPANESE

最後のケーキを誰かが盗んだと思う

BACK INTO ENGLISH

I think someone has stolen the last piece of cake

INTO JAPANESE

私は誰かが最後のケーキを盗んだと思う

BACK INTO ENGLISH

I think I stole the last cake anyone?

INTO JAPANESE

誰も最後のケーキを盗んだと思うか。

BACK INTO ENGLISH

I think I stole one last piece of cake.

INTO JAPANESE

私は 1 つ最後のケーキを盗んだと思います。

BACK INTO ENGLISH

I think I stole one last piece of cake.