ことか
(Koto ka)
Used with interrogatives to express a strong, often emotional, exclamation.
Connection rules
- +Question word (How/What) + Verb/Adjective + ことか
Examples
1.
合格を知った時、どんなに嬉しかったことか。

Goukaku wo shi ta toki, donnani ureshika ta koto ka.
How happy I was when I found out I passed!
「Joyful realization」
2.
一人の生活がどれほど寂しいことか。

Ichi nin no seikatsu ga dore hodo sabishii koto ka.
How lonely it is to live alone.
「Living alone」
Practice
How much my parents rejoiced when I told them I was getting married!
結婚することを伝えたら、両親がどれほど___。
Romaji also accepted