its是所有格,意思是它 只是一个单词,表示所有格。its ear ** black,它的耳朵是黑色的。it's是两个单词,it **的缩写,意思是它是, it's a cat,它是只猫。例句与用法:when the horse had fin**hed the race, its sides were wet with foam.这匹马结束比赛时,它的脊背被汗水湿透了。the 50p coin has a crowned lion on its reverse.50便士硬币反面的图案是个戴皇冠的狮子.i don't know the price of the dress; its ticket has fallen off.我不知道这件衣服的价钱,它的标签掉了。the little cat drank its milk and washed its face.小猫喝了牛奶,又洗了脸。the baby threw its food on the floor.那个小孩儿把食物扔到地上了。而it's = it **如:it ** a book.真情为您解答,敬请采纳,如对本题还有疑问可追问,good luck! 20210311