唱歌的英语单词是singing还是sing a song?

唱歌的英语单词是singing还是sing a song? 唱歌的英语单词 你擅长谁唱歌吗 是are you good at sing还是good at singing 唱歌跳舞的英语单词是什么 唱歌的英语单词怎么写 I heard them sing in the classroom.是对的,为什么I heard them singing in the classroom.不对?正在唱歌不应该用singing吗? 正在唱歌的英文怎么写She is singing. 唱歌跳舞的英语单词怎么写 我们在唱歌的英语单词怎么写 唱歌和跳舞的英语单词怎么写? [They stayed up all night singing and dancing.]They stayed up all night singing and dancing.他们整晚都在唱歌和跳舞.请问这里的sing和dance,为什么要用分词形式?这时是现在分词还是动名词?如果我改成动词原形的 我喜欢唱歌和跳舞怎么用英语说?是 I like dancing and singing 还是 I like dancing and sing? sing的名词到底是singing还是singer为什么 英语中,by 与beside有何区别?我在你身边唱歌.是:I am singing by you还是：I am singing beside you请问by 与beside有何区别? 唱歌是名词还是动词 唱歌的翻译是sing song还是sing songs? 帮助我唱歌的英文是名词还是动词 英语翻译：听他唱歌是件令人兴奋的事.It is exciting to hear him sing songs.这里sing要不要改为singing