When to use "終了する" vs "終わります”？
I realize that 終了する is an action verb meaning "to finish" as in doing something. Yet I will never really hear people say this often (or I'm just not trained in hearing this word yet). I usually hear people use 終わります/終わりました/おわった/etc.

Could someone on here give me some example sentences of the differences between these and when to use which (or are they perfectly interchangeable?)

Question

When to use  "終了する" vs "終わります”？
I realize that 終了する is an action verb meaning "to finish" as in doing something. Yet I will never really hear people say this often (or I'm just not trained in hearing this word yet). I usually hear people use 終わります/終わりました/おわった/etc.

Could someone on here give me some example sentences of the differences between these and when to use which (or are they perfectly interchangeable?)

Answer

終了します　is interchangeable  with 終わります
終了する　is intercangeble with 終わる
終了 sounds slightly formal.
終わりました and 終わった are the past.

Answer

generally the rule is that if it is a Chinese loan word, then it is less likely to be used in informal settings. So, my guess would be that this might be used in more formal writing.

Answer

“你做啥买支笔啊？你跟我玩啊？”
你以后再在外面不回答我的问题，我就把你关掉，看病我都让你说不出话来。你怎么不回答我叫过来的人问题呢？我说他们要你脑子弄坏了，这次就算了。你发给日本人又怎么样？我怕日本人啊？你又没有我们家的关系！你们又没有日本官员关系的！