YOU SAID:
I have school in the morning and I am tired.
INTO JAPANESE
私は朝学校があり、疲れています。
BACK INTO ENGLISH
I have a morning school and am tired.
INTO JAPANESE
私は朝の学校があり、疲れています。
BACK INTO ENGLISH
I have a morning school and am tired.
That didn't even make that much sense in English.