YOU SAID:

I wonder if this will work or not

INTO JAPANESE

私はこれがうまくいくかどうか疑問に思います

BACK INTO ENGLISH

I doubt if this will work

INTO JAPANESE

これがうまくいくかどうかは疑問だ

BACK INTO ENGLISH

I doubt if this will work or not

INTO JAPANESE

これがうまくいくかどうかは疑問です

BACK INTO ENGLISH

It is doubtful whether this will work

INTO JAPANESE

これがうまくいくかどうか疑わしい。

BACK INTO ENGLISH

It is doubtful whether this will work.

INTO JAPANESE

これがうまくいくかどうか疑わしい。

BACK INTO ENGLISH

It is doubtful whether this will work.