what happened 和WHAT IS HAPPEND的区别区别在哪里啊?还有个WHAT IS HAPPENING,发生了什么应该是WHAT HAPPEND 那WAHT IS

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whathappened和WHATISHAPPEND的区别区别在哪里啊?还有个WHATISHAPPENING,发生了什么应该是WHATHAPPEND那WAHTISwhathappened和WHATIS

what happened 和WHAT IS HAPPEND的区别区别在哪里啊?还有个WHAT IS HAPPENING,发生了什么应该是WHAT HAPPEND 那WAHT IS
what happened 和WHAT IS HAPPEND的区别
区别在哪里啊?还有个WHAT IS HAPPENING,发生了什么应该是WHAT HAPPEND 那WAHT IS

what happened 和WHAT IS HAPPEND的区别区别在哪里啊?还有个WHAT IS HAPPENING,发生了什么应该是WHAT HAPPEND 那WAHT IS
happen是不及物动词,没有被动语态,因此不可说what is happened.
WHAT IS HAPPENING正在发生什么事情;
WHAT HAPPENED 发生了什么事情.
时态有别.

只有WHAT HAPPEND 没有 WAHT IS HAPPENED

一般只有WHAT HAPPEND