He was tired after walking so long .为什么动词是ing形式的?

He was tired after walking so long .为什么动词是ing形式的? He was so strong that he felt( )tired after a long walk 1.After a long walk,he was () tired. He was very tired,so he walked very 【slow】用括号的适当形式填空 动词ing形式作介词宾语就是在介词后面接动词ing形式,怎么go on walking是作动词的宾语 现在进行时是不是就是动词ing形式?He likes ___ with it at home .为什么是play的ing after so long a walk,he was too------further ________the boy get tired after walking a long way? she was very tired after walking for three hours.中为什么用walkin After working all day,he was so tired that he was in no After a long walk,Eren was tired.He was hungry,too.（保持原句意思基本 After a long walk ,Bill was tired.He was hungry,too.保持原句意思不变