YOU SAID:

Well this was fun but I must get back to my colonoscopy

INTO JAPANESE

まあこれは楽しかったけど、大腸内視鏡検査に戻らなければならない

BACK INTO ENGLISH

Well this was fun but I had to go back to colonoscopy

INTO JAPANESE

まあこれは楽しかったが、大腸内視鏡検査に戻らなければならなかった

BACK INTO ENGLISH

Well this was fun but I had to go back to colonoscopy