my的主格是I,my是形容词性物主代词,意思是“我的”,则主格是“我”,I。解释:my 英[maɪ] 美[maɪ] adj. 我的(I的所有格形式); int. 啊呀; 天啊; [例句]I invited him back to my flat for a coffee我邀请他回我的公寓喝杯咖啡。I received a bill for the car rental from my credit card company 我收到一张我的信用卡公司寄来的汽车租金账单。My understanding was that we'd meet at her place. 我的理解是我们在她那儿见面。Yes, of course, my darling. 是,当然了,亲爱的。My goodness, Tim, you have changed! 我的天,蒂姆,你变了!My girlfriend Lynn and I eloped 我和女友琳恩私奔了。I had a long talk about this with my best friend 我和我最好的朋友就此事进行了长谈。