what had happened happened again,这句语法对么,或者怎样改,

What had happened?What had happened?What had happened? what is wrong had happened? what happened what had happened 有什么区别呢 What had she happened?改为宾语从句 He d____ exacxtly what had happened. WHAT HAD HAPPENED这是什么形式 I asked him what had happened 为什么要用had happened 而不直接用happened what happened to 和 what had happened to的区别是什么? What happened和What had happened意思 区别?使用的区别,在什么情况下使用? He asked,What has happened to you?变为间接引语该怎么变是He asked what had happened to me.还是He asked what I had happened . what had happened happened again,这句语法对么,或者怎样改, what （ ）in you country in the last few years A.happens B.happened C.has happened D.had happened To his credit,Tom never told the enemy exactly what had happened.happened前面可以加had吗?不是一般都直接写成what happened. 期末考~急what happened on the road yesterday?it had a car acident.had为什么不用happened what （）to her last night?what's she crying for?A happenedB is happenedC was happened D had happened I had no chance to explain what had happened的同义句 I didn't _______ explain what had I had no chance to explain what had happened的同义句 for a moment she just stood there,unable to believe what had just happened.to believe what had just happened在句中做什么成分