早教吧 育儿知识 作业答案 考试题库 百科 知识分享

Wemustbeatthetheatreby7o'clockthisevening.请问这句中by的用法和at有什么不同呢?

题目详情
We must be at the theatre by 7o'clock this evening.
请问这句中by的用法
和at有什么不同呢?
▼优质解答
答案和解析
请看以下例句 - 是一个意思You must be home by 7 o’clock - 说的是最晚7点"If you're not home at 7,then be home before 7."You must not leave until 7 o'clock.- 说的是最早7点"If you're not leaving at 7,the...