プログレッシブ和英中辞典(第4版)の解説
－こそ
((係助詞))
これこそ探していたものです
This is 「the very thing [just the thing] that I have been looking for.
彼はそれこそびっくりした
He was really terribly frightened.
私こそお便りしなければなりませんでした
It's I who should have written to you.
ほめこそすれ，けなしたことは一度もない
I have praised him often but never once criticized him.
彼こそその使命にうってつけだ
He is 「the ideal man [just the right man] for that mission.
今年こそがんばろう
This year I'll really make an effort.