Tell me more ×  Are all of these grammatically correct and
equivalent?  Even if I fail  Even should I fail  Even if I
should fail  What are the differences, if any? Could the last
example be misinterpreted to mean that failing is a desirable
outcome?  share|improve this question add comment  3 Answers
All three are grammatically correct, and have the same meaning.
However, they are not grammatically equivalent: the first is set
in the future real (or "factual") conditional tense, while the
second and third are set in the future unreal (or
"counterfactual") conditional.  Conditional tutorial - Future
conditionals  Wikipedia on conditional sentences  share|improve
this answer add comment  All of them are grammatically correct
and mean the same thing. The last example means "even if I did
actually fail"  share|improve this answer All of them are
grammatically correct, and essentially equivalent. The ones with
should are rather more old-fashioned, though, and would be less
natural today unless you wand to sound