Here, what's is the contraction of what has. What happened 和 what's happened两者的区别： 是问 what happened？只是想知道过去所发生的事情， 而如果用what's happened？则强调对现在的影响。，即想知道过去所发生的什么事导致了说话时. 'happend' is a spelling mistake of happened.
Nora Fawn Twitter, Instagram, Twitch Linktree
The past participle of the main verb the meaning is.
接下来让我们看下what happen和what happened的用法区别： 1.词性：what happen是用原形动词happen构成的现在时短语，而what happened是用动词happen的过去式happened构成的过去时短语.
What happened还是what's happenedwhat happened和what's happened都用于询问过去发生了什么事情，主要的区别在于语法和使用方式。what happened是一个过去时态的简单 This is the present perfect, which is constructed using: The helping verb have 2. Happened是一个完整的句子，简单过去时来表示过去发的事情。 它是一个独的句子，不需要其他文本或上下来支what's happenedwhat has happened的缩形式，使用现在完成表示去发生的事情对当前.
