how quickly time flies!这里flies为什么不用原型呢?

how quickly time flies!这里flies为什么不用原型呢? Time flies quickly and everything_____changes 改错How time flies!A mouth past quickly! how time flies How time flies!是什么意思? How time flies(fly)! time flies how time fly How time flies!Ten years has passed.为什么这里的Ten years是看作单数? How time flies!怎样翻译 Dear Tom, Time flies quickly 英语翻译 how time flies 中flies是fly的单三形式还是名词复数形式,为什么? Time flies