JLPT N1
～だろうに
surely… but; should have (regret); must have been
Structure / Usage
Verb/Adjective (plain form) + だろうに
Example Sentences
もっと早く出発すればよかっただろうに。
You should have left earlier.
彼も辛かっただろうに、一言も弱音を吐かなかった。
It must have been hard for him too, but he didn't complain once.
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