Final answer:
The sentence 'I wish he would pass the exam,' does not naturally lend itself to a standard question tag due to it expressing a wish or hypothetical situation. In English, we generally do not create tag questions for wishes. For creative purposes, changing the statement to 'He will pass the exam, won't he?' could work but alters the meaning.
Step-by-step explanation:
The correct question tag to the statement “I wish he would pass the exam,.................?” is not straightforward, as it is a wish or hypothetical statement rather than a straightforward assertion. When constructing tag questions, we usually match the subject and auxiliary/modal verb of the main sentence. However, wishes don't follow the standard structure for question tags. Typically, if the sentence was in the present simple tense, e.g., “He passes the exam,” we would expect a tag question like “doesn’t he?” But in the case of a wish or hypothetical, English does not typically use tag questions. The main sentence is “I wish he would pass the exam,” and since this expresses a desire or hypothetical situation, we don't form a tag question in the usual way.
If we were forced to create one, it might look something like this: “I wish he would pass the exam, wouldn’t he?” but this is not standard English and is actually grammatically incorrect. For direct and accurate information, or to present a hypothetical situation as in this case, it's best to avoid trying to form a tag question. If the student needs a tag question for the statement “I wish he would pass the exam,” perhaps for creative writing purposes or to express hope in a different way, you might say something like “He will pass the exam, won't he?” which matches the positive statement with a negative tag, but this changes the meaning from a wish to a confident statement.