YOU SAID:
Yes I am definitely doing schoolwork.
INTO JAPANESE
はい、私は間違いなく学業をしています。
BACK INTO ENGLISH
Yes, I definitely study.
INTO JAPANESE
はい、間違いなく勉強します。
BACK INTO ENGLISH
Yes, I will definitely study.
INTO JAPANESE
はい、必ず勉強します。
BACK INTO ENGLISH
Yes, I will definitely study.
You've done this before, haven't you.