All you have to do is to study as hard as you can.

이문장에서요 색칠한 부분에서 동사가 have 랑 is 두개 쓰인거같은데 ㅠㅠ

설명좀 해주세요 제 예측으론

All you have to do (that) is to study as hard as you can 이거 같은데 아닌가요 ㅠ