YOU SAID:

I need to go to sleep soon because I am tired.

INTO JAPANESE

私は疲れたのですぐにスリープ状態にする必要があります。

BACK INTO ENGLISH

You need to sleep soon because I was tired.

INTO JAPANESE

疲れていたのですぐにスリープする必要があります。

BACK INTO ENGLISH

You need to sleep soon because I was tired.