每年是用every year 还是every years 这两者有什么区别?

每年是用every year 还是every years 这两者有什么区别? 是''on New year's Eve''还是''at New year's Eve''Quickly! New Year‘s Eve 前用in 还是on christmas eve是用merry还是HAPPY? 每隔一年在英文中是once every other year还是once every another year? in the new year's eve 介词是用IN吗? Then he smiled and told me I would receive an extra thousand pounds a year!出自新概念中,请问（1）a year 表示就是今年一年,还是每年呢,那么每年不是应该用every year吗,（2）另外句子中已经有具体的数字 thousan Christmas Eve前面是用at还是on 是on Spring Festival's Eve还是用in 圣诞节前夜的英文是Christmas Eve还是Christmas’ Eve 英语完成下列句子:每年9月10日是中国的教师节.( )in China every year. New Year'eve是什么意思? 一年一次是every a year还是once a year 为啥? 他每年用南瓜制作灯笼.用英语怎么说按he____ a ____ ____ _____ a _____ every year. 我们每年都去长城旅行.用英语怎么说?We_ _ _ _to the Great Wall every year 每年都有一个暑假 用英文怎么翻译?There is a summer vacation every year可以吗 用英语怎么说:吉姆每年有两个月的假期吉姆每年有两个月的假期Jim has a ____ ____ every year 夏娃的英文是eva还是eve?