3点45是“a quarter to four"还是"quarter to four"

3点45是“a quarter to four还是quarter to four 8点45分是quarter to nine还是a quarter to nine 英语时间话说,a quarter to eight 是几点来着? 7点15,和7点45 英语是啥来着,用quarter表达. 12点45分 可以是 twelve forty-five 或者 a quarter to one那可不可以是 fifteen to one?或者说 有quarter就不能用fifteen了?quarter完全把fifteen取代了吗? 不明白为什么单单a quarter to four就能表达3点45分? a quarter to a quarter to two. a quarter to a quarter to five a quarter to a quarter to 快 a quarter to six a quarter to a quarter to four quarter 已经是一刻钟的意思了,为什么a quarter to seven.前面还要加一个a呢?回答要详细点、不然我不能理解 英语6点45的表达哪个对如题 three quarters past six quarter后加还s a quarter to seven 为什么9点45是it's quarter to ten.To 在句子里充当的含义是,为什么9点45是it's quarter to ten. To 在句子里充当的含义是, 12:45一般是念 a quarter to one,那可以念twelve forty five吗?