UPSC NDA II 2015 General Ability Paper

Concept:The sentence uses “until” incorrectly with a negative. In English, “until” itself implies a negative condition, so using “don’t” is redundant.Explanation:The original sentence is: “Until you don’t finish the work, you won’t be given leave.”The word “until” already means “up to the time that something happens.”When the main clause is negative (e.g., “won’t be given”), the subordinate clause after “until” must be in the positive form.So the correct structure is: “Until you finish the work, you won’t be given leave.”Option A (“Until you must finish”) changes the meaning by adding obligation.Option B (“Until finishing”) is grammatically awkward; “until” + gerund is not standard here.Option C (“Until you finish”) removes the unnecessary “don’t” and keeps the tense correct (simple present in the time clause).Option D (“No improvement”) would keep the error.Therefore, the only grammatically correct and natural option is C.Answer:Option C – Until you finish