He is following us all the time,为什么follow要加ing

He is following us all the time,为什么follow要加ing Who can answer the following question?为什么在follow后加ing time is running out 为什么run要加ing呢? he thinks reading is interesting 为什么read要加ing? he job is washing clothes 为什么要加ing? he teaches us play the piano这个play要不要加ing what is the meaning 为什么meaning要加ing he usually goes swimming in his fer time为什么要加ing all about us --he is we歌词加翻译. When is he going to play the piano?为什么加ING He often swimming为什么要加ing Life is all about making connections 这里的make为什么要加ing?