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I would go with "have" there. The future tense of the main clause makes it clear that the second clause is also in the future. I would use "have had" only for consumables. For example, if the items were food items that had been eaten, "until they have had all the cheeseburgers". :lol:
I would go with "have" there. The future tense of the main clause makes it clear that the second clause is also in the future. I would use "have had" only for consumables. For example, if the items were food items that had been eaten, "until they have had all the cheeseburgers". :lol:
I would go with "have" there. The future tense of the main clause makes it clear that the second clause is also in the future. I would use "have had" only for consumables. For example, if the items were food items that had been eaten, "until they have had all the cheeseburgers". :lol: