free能加ing么

free能加ing么 free parking 为什么加ING 不加行不行 We can have a hamburger for free that day.for后面不是加ing 的么,难道是介词后的动词加ing,名词不加? paint能加ing吗? Don't spend your free time playing computer games.中play为什么要加ing? they are hanging out in the shop.they are free.为什么hang要加ing free 可不可以变ING.rt with能加ing形式with能加ing形式吗 China saw mounting number of museums offering free admissons to the public recently.mounting 为什么-ing?admissions为什么加-s? should 后面能加动词ing形式吗? i like travel (travel)能加ing吗 water 能加ing吗?water不是名词吗? [英语]decide on能加ing形式的动词吗? “no”能加动词的ing形式吗? 一般过去时was were后加ing么? when后面动词要加ing么 open双写n加ing么? afford 可加动词ing么