but if

Tom couldn't help but wonder if everybody was safe.

I can't help but wonder if that really happened.

deIch kann nicht umhin, mich zu fragen, ob das wirklich passiert ist.

I can't help but wonder if Tom will be at school tomorrow.

deIch kann nicht umhin, mich zu fragen, ob Tom morgen zur Schule kommen wird.

Tom could make you do that, but I doubt if he will.

Tom says he'll do that, but I wonder if he really will.