だろうに

but I suppose

Meanings

  1. expression, usu. sentence end, expressing supposition but I suppose; it seems; probably; I guess

In sentences

君きみはそれを出来できただろうに。 You could have done it. #177693

本人ほんにんが謝あやまるのが筋すじだろうに。 The person in question should probably apologise. #11029896