“又”和“再” 是两个常出错的两个词，原因在于它们都有 “again” 的英文意思，而且它们并不能混用。
In general, “又” means “again,” but only for actions that are set and unchangeable; to say “again” for actions that are projected or anticipated, use “再”. Usually, this means that “又” is used for the past and present and “再”is used for the future.
But not always, “又” can be used for the future when something is not subject to change.
现在我们就用下面这个对话包括了4个“又” “再” 的最常用法。
A: “你前天吃饺子，昨天又1吃，明天就别再2吃饺子了。”
B: ”我喜欢吃饺子，你说过不再3管我吃什么，现在你怎么又4来管我。我们说好周末都吃饺子，明天是周末，我们当然又5吃饺子喽！
“又”，to say “again” for a repeated action that happened in the past.
“再” ，to say “again” for actions that are projected or anticipated in the future.
“再”, to be used for the past if someone was, at a particular past moment, projecting something forward.
“又”，to be used for the present.
“又“, to be used for the future when something not subject to change.
