I have a backache and pain my eyes

I have a backache and pain my eyes coz i was ใช้ computer for a long time

ผลลัพธ์ (อังกฤษ) 1:

I have a backache and pain my eyes coz i was using the computer for a long time.

ผลลัพธ์ (อังกฤษ) 3:

I have a backache and pain my eyes coz I was use computer for a long time.