YOU SAID:

im pretty sure this isn't gonna work

INTO JAPANESE

私はかなりこれは動作しないと確信しています

BACK INTO ENGLISH

I am pretty sure this will not work

INTO JAPANESE

私はこれがうまくいかないと確信しています

BACK INTO ENGLISH

I am convinced that this will not work

INTO JAPANESE

私はこれがうまくいかないと確信しています

BACK INTO ENGLISH

I am convinced that this will not work