look+ing怎么加?

look+ing怎么加? Look后面要加ing吗? 英语单词怎么加ing climb怎么加ing listen 怎么加ing eat怎么加ing join怎么加ing? dance怎么加ing? buy怎么加ing dance怎么加ing enjoy怎么加ing catch怎么加ing come+ing怎么加? watch+ing怎么加? 讨厌怎么加ing cry怎么加ing 怎么加ing snow怎么加ing?