play a song on the tape
テープで歌を流す
play a tune on the guitar
ギターで１曲ひく
play a tune on the piano
ピアノで曲を弾く
play a vital role [part] in ...
…にきわめて重大な役割を果たす
play a [the] waiting game
待機戦術をとる
play ad lib
即興で演じる
play against another team
他のチームと試合をする（◆againstは省略可）
play an important part
重要な役目を果たす
play an important part [role] in ...
…に重要な役割を果たす
play around in the garden
庭で遊び回る
