YOU SAID:

I don't reckon that I did it right

INTO JAPANESE

私は右のそれをやったことがないと思う

BACK INTO ENGLISH

Don't think that I've done it right

INTO JAPANESE

私はそれをやったことが正しい思う

BACK INTO ENGLISH

I got it right I think

INTO JAPANESE

私はそれを正しいと思う

BACK INTO ENGLISH

I think I am correct that

INTO JAPANESE

私は私は正しいと思うが

BACK INTO ENGLISH

I think I have

INTO JAPANESE

私が持っていると思う

BACK INTO ENGLISH

I think that I have

INTO JAPANESE

私が持っていると思う

BACK INTO ENGLISH

I think that I have