プログレッシブ和英中辞典(第4版)の解説
すすんで【進んで】
〔喜んで〕willingly;〔自発的に〕voluntarily
彼はいつも進んで難しい仕事を引き受ける
He is always ready to undertake difficult tasks./He always undertakes difficult tasks willingly.
彼は進んでその仕事を引き受けた
He volunteered [offered (of his own accord)] to do the work.
彼はパーティーに出席するたびに進んで新しい友人を作った
Whenever he went to a party, he 「made an effort [took every opportunity] to make new friends.