请问Lily likes singing.sing后面为什么加ing

请问Lily likes singing.sing后面为什么加ing Jenny likes singing. singing是什么成分 请问Jane likes singing.She is often heard _______ after class. A.singing B.to sing C.sings D.sang My mother liKes singing对吗 Everyone likes singing同义句 Lily is singing.Lucy is singing,too.合并成一句 lily likes ( )kites very much. lily just likes English 翻译 Lily ____ to dance a.prefers sing B.prefers singing C.asked for an ill leave d.likes to sing better thanC.like singing better than,提多了看花了 I like singing.Mike likes singing,too.(同义句） His sister likes singing and she is singing t____ his brother likes singing very much 对singing 进行提问 He likes singing 改为一般疑问句 Nancy likes singing改成否定句 Mary likes singing and dancing.一般疑问句 She likes singing and dancing否定句 小学英语题目：My mother likes singing/sing ? he likes singing better then dancing