The next is more difficult only because, besides the compression, the if-clause is protasis not to the expressed main sentence, but to another that is suppressed.
I shall wait for fine weather, if that will ever come. — R. G. White.
Given fully, this would run: I shall wait for fine weather (at least I should say so) if (I were sure that) that will ever come.
(3.) When an if-clause is not a condition at all, as for instance where it expresses contrast, and is almost equivalent to although, the ordinary plain-future use prevails. Thus: If annihilation will end our joys it will also end our griefs. Contrast with this the real condition, in: If annihilation shall end (or ends) our joys, we shall never regret the loss of them.
Indefinite clauses, relative or other, bearing the same relation to a conditional or future principal sentence that a conditional protasis bears to its apodosis follow the same rules. Thus Whoever compares the two will find is equivalent to If any one compares; When we have won the battle we can decide that question is equivalent to If ever we have won. Accordingly we can if we choose write Whoever shall compare, and When we shall have won; but we cannot write When we will have won, and must only write Whoever will compare if we distinctly mean Whoever chooses to compare. As there is sometimes difficulty in analysing indefinite clauses of this sort, one or two instances had better be considered.
The candidate who should have distinguished himself most was to be chosen.
This is clear enough; it is equivalent to if any one should have... he was...
We must ask ourselves what victory will cost the Russian people when at length it will become possible to conclude the peace so ardently desired.— Times.
Equivalent to If ever it at length becomes. Will is therefore wrong; either becomes, or shall become.
Nothing can now prevent it from continuing to distil upwards until there shall be no member of the legislature who shall not know...—Huxley.
