YOU SAID:
I'm so tired, let me sleep
INTO JAPANESE
私はとても疲れている、眠らせる
BACK INTO ENGLISH
I am very tired, let me sleep
INTO JAPANESE
私はとても疲れています
BACK INTO ENGLISH
I am very tired.
INTO JAPANESE
私は、とても疲れている。
BACK INTO ENGLISH
I am very tired.
That didn't even make that much sense in English.