by then是什么意思?

母语人士的回答
Rebecca
By then at that time意思。所以,套用这段视频中的那句话, he should be finished at that time 。示例: We will be in our new house by then. = We will be living in our new house at that time. (那时你将住在新房子里。) 示例:那时I will be 25 years old by then. = I am 24 years old now, but I will be 25 years old at that time. (我现在 24 岁,但那时我将 25 岁。)