YOU SAID:

I'm beginning to think his mind is no longer in mint condition

INTO JAPANESE

私は彼の心がもはやミントの状態にないと思うようになり始めている

BACK INTO ENGLISH

I am starting to think that his mind is no longer in a state of mint

INTO JAPANESE

私は彼の心がもはやミントの状態にはないと考え始めている

BACK INTO ENGLISH

I am beginning to think that his mind is no longer in mint condition

INTO JAPANESE

私は彼の心はもはやミントの状態ではないと考え始めている

BACK INTO ENGLISH

I am thinking that his mind is no longer in a state of mint

INTO JAPANESE

私は彼の心がもはやミントの状態にないと考えている

BACK INTO ENGLISH

I believe that his mind is no longer in a state of mint

INTO JAPANESE

私は彼の心がもはやミントの状態にないと信じている

BACK INTO ENGLISH

I believe that his heart is no longer in mint condition

INTO JAPANESE

私は彼の心はもはやミントの状態ではないと信じている

BACK INTO ENGLISH

I believe that his heart is no longer in mint condition