The helping verb have 2. The past participle of the main verb the. There happened to be是由there be句型演变过来的，仍是there be结构； it happened to be.，意思是：结果碰巧是.
Unraveling The Mystery Of Sone 436 What Is It?
'happend' is a spelling mistake of happened.
What happened?和what's happening?的区别是什么？ what happen?表示发生了什么，用于询问发生了什么事情，通常用于过去的事件或突发情况。
例句：there happened to be a telephone booth. 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: When describing an event in the past speech, should i use present or past tense for happen.
Here, what's is the contraction of what has.
