happened 是过去式 可能是过去发生过什么事 但是人们不知道 所以意思是
人们永远不知道过去发生了什么
假如是 happen 一般式 那就是 人们不知道发生了什么
将来式是 people never know what will happen 意思是人们不知道将来会发生什么事
以上是个人意见
People never know what happened?
3个回答
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