英语翻译when shall we meet?为什么要用shall?shall是 .要不要.的意思啊

英语翻译when shall we meet? when shall we meet again这里的shall是什么意思? but when shall we meet的翻译 When shall we meet tomorror? when shall we meet again? what time shall we meet的意思 when shall we meet tomorrow? let's When shall we meet again next week. 1、—When shall we meet again? ___ shall we meet? shall we meet Where shall we meet?