英语every four years为什么year要加s,不是every加单数吗?

every four years代表什么 every four years什么意思? 英语every four years为什么year要加s,不是every加单数吗? The Olympic Games are heldA every four years B every four year C every fourth years D every four-years every four years的同义词组 the Olympic Games_____(hold) every four years. every four years 应该用什么提问 The Olympic Games take place （every four years）对every four years提问 every four years和every fourth year一样吗? every fourth year和every four years一样吗 every four years和every fourth year一样吗? 请教英语片语辨析的问题The Olympics is hold every four years/every fourth year,是不是正确的,如果不是,every four years 和every fourth 是is held啦 every four years 和each four years哪一个对说明理由 every four years同义词 大致各式有没有four years……（不知道了） 英语翻译they are both held every four years The olympic games (are)?held every four years. Olympic Games are held every four years翻译 olympic games ____held every four years用is还是are