用一旦将造一个句子 一旦将怎么造句呢

用一旦将造一个句子 一旦放弃,你将永远不能成功 1.By the time you reach the station, the train will have left. 2.I will have eaten up my meal before she comes back.3.By the end of next month, he will have traveled 1000 miles . i will take the leading positio