有half a month 这个说法吗?

有one and half a month这种说法吗? one month and a half和one and a half month有区别吗? half 和 half a month有什么区别？ month and a half HALF A MONTH AWAY a half of year有这样的说法吗? 英语翻译必须有“my parents,be,london,half a month” every half month与every half a month 哪个对 one and a half month用加s吗? 有有没有a half past three 的说法 ----- were you there ?---Half a month. 有half a year 的说法,那有没有a half year 的说发?