良(よ)くするto make good, to improve, to do often, to do well

歌(うた)を良(よ)くする彼(かれ)は歌手(かしゅ)になれます。

He, who improves his singing, can become a singer. {to make good, to improve, to do often, to do well}

書道(しょどう)を良(よ)くする親友(しんゆう)は書道(しょどう)教室(きょうしつ)の先生(せんせい)になった。

My best friend who improved at calligraphy has become a teacher at a calligraphy school. {to make good, to improve, to do often, to do well}

国語(こくご)が苦手(にがて)なので、詩(し)を良(よ)くする友人(ゆうじん)が羨(うらや)ましいです。

Since I am not good at the national language, I envy my friend who is good at improving poetry. {to make good, to improve, to do often, to do well}

首相(しゅしょう)：「国(くに)の経済(けいざい)状況(じょうきょう)を良(よ)くするべく何(なん)らかの対策(たいさく)を立(た)てるつもりだ。」

Prime Minister: "I intend to take some measures to improve the economic situation of the country." {to make good, to improve, to do often, to do well}

良(よ)くしたもので、私(わたし)が失恋(しつれん)で沈(しず)んでいる時(とき)も、時(とき)が見方(みかた)をしてくれたのです。

Doing well, even when I was down due to heartbreak, time was on my side. {to make good, to improve, to do often, to do well}