sentence: Kill two birds with one stone is a perfect idiom to describe Peter 's situation , because he got his beloved father back and can still pursue his dream of studying in Ireland .
modified: Killed two birds with a stone is a perfect idiom to describe Peter 's situation because he got his beloved father back and still can pursue his dream to studies in ireland.q
transformation: VERB:FORM, OTHER, PUNCT, WO, PREP, VERB:FORM, OTHER