johntoldmehedidnottoplaywiththeknife,andIthinkhehurthimselfonceAneedhaveBmighthaveCshouldDmust请按以下格式为我解答：这句话的翻译是：考查知识点是：正确答案是：

Question

john told me he did not to play with the knife,and I think he _hurt himself once
A need have Bmight have C should Dmust
请按以下格式为我解答：
这句话的翻译是：
考查知识点是：
正确答案是：

Answer 1

约翰告诉我他没有玩刀,而我认为他可能曽伤害过自己.
考查情态动词的用法.
正确答案为B