Let's make it half past six.为什么half past six前面不加at

Let's make it half past six.为什么half past six前面不加at Let's make it half past six . at half past six Let's make it half past six.make在这儿当什么讲? 仁爱版八年级英语教材中有个句子“Let's make it half past six”,怎么不用介词at呀? It's half past six.啥意思? It's half past six(what) 英语翻译when shall we meet?let＇s make it half past six Let's make it half past six.的意思是不是让我们6点半做她? half past six是几点 At half past six是何意思? come at half past six意思,急,