1、詞性上的區別their是形容詞物主代詞，後面可以接名詞。theirs是名詞性物主代詞，後面不能接名詞2、意思上的區別their：他（她，它）們的theirs：他們的; 他的或她的。造句：①、theirIt would cost about £ 3,000 to install a new heating system in a flat such as theirs在他們那樣的一套公寓房裡安裝一套新的供暖系統可能要花費3,000英鎊左右。Theirs had been a happy and satisfactory marriage. 他們的婚姻曾經一直幸福美滿。②、theirsThere was a big group of a dozen people at the table next to theirs 他們旁邊的桌上坐了一大群人，有十幾個。This child is nobody"s child until someone makes her theirs officially. 在有人辦理正式手續認領以前，這個孩子不屬於任何人。擴充套件資料theypron.她們；他/她/它們；人們，大家;政府，當局。例句：They say there"s plenty of opportunities out there, you just have to look carefully and you"ll find them 他們說，那裡機會多的是，你只要仔細找就能發現。People matter because of what they are, not what they have 人之所以重要，不在於他們擁有什麼，而在於他們是什麼樣的人。The young horses broke in a pack, and over the first furlong, they remained in a pack. 幾匹小馬一起衝出，跑完頭一弗隆後還沒拉開距離。
1、詞性上的區別their是形容詞物主代詞，後面可以接名詞。theirs是名詞性物主代詞，後面不能接名詞2、意思上的區別their：他（她，它）們的theirs：他們的; 他的或她的。造句：①、theirIt would cost about £ 3,000 to install a new heating system in a flat such as theirs在他們那樣的一套公寓房裡安裝一套新的供暖系統可能要花費3,000英鎊左右。Theirs had been a happy and satisfactory marriage. 他們的婚姻曾經一直幸福美滿。②、theirsThere was a big group of a dozen people at the table next to theirs 他們旁邊的桌上坐了一大群人，有十幾個。This child is nobody"s child until someone makes her theirs officially. 在有人辦理正式手續認領以前，這個孩子不屬於任何人。擴充套件資料theypron.她們；他/她/它們；人們，大家;政府，當局。例句：They say there"s plenty of opportunities out there, you just have to look carefully and you"ll find them 他們說，那裡機會多的是，你只要仔細找就能發現。People matter because of what they are, not what they have 人之所以重要，不在於他們擁有什麼，而在於他們是什麼樣的人。The young horses broke in a pack, and over the first furlong, they remained in a pack. 幾匹小馬一起衝出，跑完頭一弗隆後還沒拉開距離。