... stress in these wordsaffects the spelling:confer conferred conferring conferencedefer deferred deferring deferenceinfer inferred inferring inferenceprefer preferred preferring preferencerefer ... ity = sincerityseparate + ion = separationachieve + ed = achievedDo, however, keep the -e in words like singeing(different from singing) and dyeing (different5ADDING ENDINGSfrom ... twowords ski-ing and taxi-ing.try + ing = tryingempty + ing = emptyingDon't apply the rule in these fourteen cases:daily, gaily, gaiety, laid, paid, said, slain,babyhood,...