不到长城非好汉 he who -doesnot---reach the great wall -IS-- not a r

哪里是划线部分?
再问： _doesnot___ _IS__ 就是把这几个词用别的代替
再答： One who fails to reach the Great Wall is not a hero. He who has never been to the Great Wall is not a true man. He who does not reach the Great Wall is not a true man. 不到长城非好汉。