一个语法问题
Oilrigshavetoberepairedfrequentlyanddivers,whooftenhavetoworkindarknessahundredfeetunder,havebeenfrightenedoutoftheirwitsbygiantfishbumpingintothemastheywork.
这里的bumping是什么成分,为什么用ing
nowtheyhavehadspecialcagesmadetoprotectthemfromthesemonsters.
madeto是动词吗,made前面怎么没有to