I knew that my turn had come为什么用knew

I knew that my turn had come为什么用knew I knew that my turn had come. knew that my turn had come Twenty people had already left .I knew that my turn had come i knew that my turn had come.这是新概念二上面的一句话,为什么用had+动词原型这个用法? I knew that my turn had come.这句话怎样理解 I knew that my turn had come我知道这次该轮到我了!my turn是什么意识 i kenw that my turn had come为什么不用had to ? if only i had knew that at that moment I knew that English scientists had cloned a sheep,but I knew 英语翻译The Fray - Over My Head I never knew I never knew that e when I was in my teens I knew my mother had problems seeing