peace的副詞形式是什么

　　Her son was lying peacefully on his back.

　　她兒子正靜靜地仰面躺著。

　　Except for traffic noise the night passed peacefully.

　　除了交通噪音，那夜安寧地過去了。

　　The older three girls are still slumbering peacefully.

　　稍大些的3個(gè)女孩仍在平靜地睡著。