she is singing to the old people .她给老人们唱歌.sing to 由 ...伴奏着唱,和着 ...唱例句：1.He sang to a piano accompaniment.他演唱由钢琴伴奏.2.The little girl likes to sing to many people.这个小姑娘喜...he often sings me songs by internet.又怎么解释，sing 也是及物动词，可以这么用吧？这个翻译为他经常上网时唱歌给我听。？he often sings me songs by internet.他常常唱我的歌曲通过互联网。