"Thereafter" means "after that" — after the time or event you just mentioned. "He worked in Taipei until 1998, and thereafter in Kaohsiung." "The first month is free; thereafter you pay $300 a month." It looks back at something already said and covers all the time from that point onward.

"Thereafter"這個字 means意思是 "after that"「之後」 ——after也就是在 the time or event you just mentioned你剛提到的時間或事件 之後。 "He worked in Taipei until 1998, and thereafter in Kaohsiung." 他在1998年之前都在台北工作，之後就到高雄了。 "The first month is free; thereafter you pay $300 a month." 第一個月是免費的，之後每個月要付300元。 It回頭指的是 looks back at something already said前面已經提過的事， and而且 covers並涵蓋 all the time from that point onward從那之後的整段時間。

It is a formal word. You meet it in contracts, price lists, official rules, reports, and history writing; you almost never hear it in a conversation with friends, where people just say "after that", "from then on", or "since then".

It它 is是 a formal word正式的字。 You你 meet it在合約、價目表、官方規章、報告和歷史寫作裡 in contracts, price lists, official rules, reports, and history writing 會遇到它； in a conversation with friends跟朋友聊天時 you你 almost never hear it幾乎不會聽到這個字，那時候 people人們 just say只會說 "after that"「after that」、 "from then on"「from then on」、 or或 "since then"「since then」。

It is also common in a very useful pattern for prices and rules: state the first case, then use "thereafter" for everything that follows — "The first twenty pages are free, and $2 per page thereafter." Notice it can sit either at the front of the clause or at the very end.

在價格和規則的說法裡in a very useful pattern for prices and rules it它 is also common也很常見：先講第一種情況state the first case，然後用 "thereafter"表示後面接下來的一切 for everything that follows —— "The first twenty pages are free, and $2 per page thereafter." 「前二十頁免費，之後每頁2元。」 Notice留意 it它 can sit可以放在 either at the front of the clause句子最前面 or或 at the very end最後面。

And though actually — it is closer to "from then on" than to plain "after". "After that" can point at one single next event; "thereafter" usually suggests the whole stretch of time that followed.

不過其實though actually，it它 is closer比較接近 to "from then on"「from then on」 than而不是單純的 plain "after"「after」。 "After that"「after that」 can point at可以只指 one single next event單一一個接下來的事件； "thereafter"「thereafter」 usually suggests通常暗示的是 the whole stretch of time that followed之後整段延續的時間。