Many years has passed since the big fire __the city chicago

Many years has passed since the big fire __the city chicago The city has many big restaurants改为否定句 Over forty years has passed since the first bridge was built Three years has passed since the students came to this schoo It has been many years since I was a big cheese. Several years has passed since we started our middle school eight years has passed since mr.wang _______ 结婚 It has passed 10 years since we met last time. Five years has passed since we met last .为什么不用have passed? 英语翻译It has been many years since the restriction led to the the year that has passed since the downfall of apocalypse! Three years has passed since he came to China.中为什么用has