YOU SAID:

I dont really know If I can do this

INTO JAPANESE

私はこれを行うことができれば私は本当に知らない

BACK INTO ENGLISH

I really don't know if I can do this

INTO JAPANESE

できるかどうか分からない

BACK INTO ENGLISH

I don't know if I can do this.

INTO JAPANESE

できるかどうか分からない

BACK INTO ENGLISH

I don't know if I can do this.