every three days 是表示每隔三天还是每三天一次（也就是没隔两天）

是every three day还是every three days(每三天) every three days 是表示每隔三天还是每三天一次（也就是没隔两天） every other three days =every four days 对不? every three day;every three days应该用哪一个? every three days是每隔3天一次,还是每隔2天(每3天)一次? every third day每隔2天=every three days每3天?every other day （每隔一天）=every 2 days 每2天every third day每隔2天=every three days每3天every forth day 每隔3天=every 4 days 每四天 every three days，every three days，every 4 ___,Monday,Wednesday,and Friday.A.Every day B.Every three days C.Every few days D,Every other dayWhy? every three days 和very third day有什么区别 按要求完成句子：Lucy usually cleans the cage every three days.(对划线部分提问)every three days划线 He went there every ____. A.three day B.third days C.three days D.a three dayWhy in three days是三天后,可以表示三天里吗,什么时候表示三天里什么时候表示三天后 three days' trip 和 a three days' trip1 three days' trip2 a three days' trip3 a three-day trip哪两个是对的 three days later 的意思和用法、 与 in three days 的区别.three days ago 是三天前? a three—day holiday a three days holidaya three—day holiday a three days holiday a three days holiday 重点是第二三个对吗? 我参考书上说每隔两天是every third day,每三天every three days,他俩相等,怎么回事啊,无语了,紧急!每隔两天不是every second day in three days within three days 都是表示在三天期间的意思吗?不定某一天 用一个单词表示once every three months 请问The winds from the southeast blow two days out of every three