
Dede W. answered 06/02/19
MA in English with 20 years teaching experience
The sentence "There should be any problem for Adam to eat that apple" is not a grammatical sentence in English. The verb needs to be negated with the addition of "not" to correct the sentence. Your correct example, "I couldn't find any problems" included the "not" as a part of the contraction "couldn't." In the other two examples, you are allowing for the possibility of problems with "if" and "were." The best way to correct your original sentence is to move it to active voice and remove "There," but this still requires the adverb "not" to negate the action. For example, "Adam shouldn't have any problem eating that apple.