YOU SAID:

I think that this is not going to work

INTO JAPANESE

私はこれがうまくいかないと思う

BACK INTO ENGLISH

I don't think this is going to work.

INTO JAPANESE

私はこれがうまくいくとは思わない。

BACK INTO ENGLISH

I don't think this will work.

INTO JAPANESE

私はこれがうまくいかないと思います。

BACK INTO ENGLISH

I don't think this will work.