A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

for a moment • for the moment
for a moment—very briefly; for a short time: He might have
popped in for a moment, since he was passing this way.
Note: 
The expression is not antonymous in meaning to the
phrase not for a moment—(emphatic) absolutely never (also:
not for one moment): Not for a moment would I suggest that
you did it deliberately.
for the moment—at present; for the time being: Sorry, Mr.
Rathbone, I’m tied up for the moment, but I can see you later
today.
for a wonder • to a wonder
for a wonder —surprisingly; strange to say: The children,
for a wonder, kept still long enough for her to hear.
to a wonder —(dated) to an astonishing extent: His motives
were not, nor could be, of the amorous kind, for she was ugly
to a wonder.
for all it’s worth • for what it’s worth
for all it’s worth —
1
. to the utmost of one’s power or ability:
Chris Reininger says the shark was huge and they were “fight-
ing for all it’s worth.” 2. (in the phrase “milk something for all
it’s worth”) exploit an opportunity, etc. to the full: A cynic
might state at this point that Ash has decided to milk this
story for all it’s worth. 3. is used to imply that one may have
doubts about the information he is offering: If the art market
is hot now, it’ll be hotter, and for all it’s worth, here are my
predictions.
for what it’s worth — = for all it’s worth 3: Oh, and for what
it’s worth, I read the second paragraph as saying that white
voters were unified in not wanting to vote for a black man.
for all the marbles • have all one’s marbles
for all the marbles —(coll.) compete for all the money or for
the top prize: This game is for all the marbles, it all comes
down to one game and the team that wants it most will win.
have all one’s marbles —(coll.) be in possession of one’s men-
tal faculties: My first teacher will never be gone from my mind
as long as I still “have all my marbles.” Cf.: lose one’s marbles —
(coll.) lack one’s mental faculties: Not only has Mike lost his
common sense, it would appear that he’s lost his marbles as
well.