Today is Saturday. The weather is warm and sunny. Bob and Jack go to the park. There are many people there. The girl under a big tree is reading a book. Two boys are playing football on the grass. The girl in a red dress is riding a bike. Two women are talking. The man beside these women is playing with a baby. Bob and Jack are beside the river. They are sitting on the chair and drawing pictures.

理解下列句子中“为”的不同含义：

①岂能为暴涨携之去？____

②众服为确论____

③必于石下迎水处啮沙为坎穴____

show sb. sth.____ 

the People's Republic of  China____

ride on a bus ____ 

want to show  ____