説在前頭（本資源庫的重要説明）
語法１｜再 is used only in connection with a contemplated action, expressing a plan, suggestion, request, or command.
1.Means “(first)...then”
2.Means “not...until”
例句１｜1.你先休息一下，再開始工作吧。
2.快上課了，我們下課以後再談吧。
語法２｜1.Means “not...until” “then and only then”
2.Means “not...until” indicating an action takes or took place later than expected.
3.Means “then and only then”
例句２｜1.我們十分鐘以前才決定去吃義大利麵的。
2.我得先買票，才可以進去看電影。
語法３｜1.Indicates the immediacy of the next action.
2.Indicates an action takes or took place sooner or earlier than expected.
例句３｜1.我吃了早飯，就去打工了。
2.他很聰明，二十歲就大學畢業了。