早教吧 育儿知识 作业答案 考试题库 百科 知识分享

i don't know whether you happened to have heard or i don't know whether you happened to hear?上面的两种说法那一个正确?

题目详情
i don't know whether you happened to have heard or i don't know whether you happened to hear?
上面的两种说法那一个正确?
▼优质解答
答案和解析
第一种正确,第一种强调听到的结果,我不知道你是否碰巧听说了.这个“了”字是通过have heard来体现的