ことか・
This pattern turns an expression of degree, amount, frequency, or manner into an emotional exclamation. It emphasizes how great, intense, moving, or difficult something is rather than asking for an answer.
Building the exclamation
Use a scale-setting expression such as どれほど, どんなに, or 何度. The surrounding situation shows the emotion: admiration and gratitude are possible, but so are longing, hardship, pain, and surprise.
長い治療の間、家族の支えが私にとってどれほど心強かったことか。
How reassuring my family's support was to me during the long treatment!
AnalyzeThe degree expression establishes a scale, while the ending presents the speaker's gratitude and strong feeling as an exclamation.
Choosing the ending
ことか is compact and strongly exclamatory. ことだろう often gives the feeling a reflective tone, while ことでしょう is its polite counterpart. In this pattern, the reflective ending does not normally need to be translated as a prediction such as “probably.”
Negative, descriptive, and polite contexts
結果が出るまでの一週間が、どんなに長く感じられたことだろう。
How long that week before the results came out felt!
Analyzeこの町で出会った人々が、どれほど親切なことだろう。
How kind the people I met in this town are!
AnalyzeA nonpast na-adjective takes な before the ending.
皆様の温かいご支援が、私たちにとってどれほど大きな力になったことでしょう。
What a tremendous source of strength your warm support has been for us!
AnalyzeThe polite ending suits a formal speech of thanks.
More examples
私は何度、もう無理だと思ったことか。
How many times I thought I could not go on!
Analyze私は子どもの笑顔に、これまでどれほど救われてきたことだろう。
How much a child's smile has sustained me over the years!
Analyzeあの知らせを聞いた時、彼がどんなに驚いたことか。
How surprised he was when he heard that news!
Analyze初めて舞台に立った時、足がどれほど震えたことか。
How badly my legs shook when I first stepped onto the stage!
Analyze山頂から見た朝日がどれほど美しかったことでしょう。
How beautiful the sunrise seen from the summit was!
Analyze私は故郷の料理をどんなに恋しく思ったことだろう。
How deeply I longed for the food of my hometown!
Analyze