The couple has?a high success rate in getting accepted as house sitters and they always go beyond the homeowner’s budget.【1】?couple表示“一对夫妻/一对夫妇”作主语，谓语动词用单数。In China today each couple is required to strictly carry out a eugenic plan.在今天的中国,要求每对夫妻都要严格执行优生计划。The couple was married in 1976.这对夫妻于1976年结婚。备注：表示等于或者大于2对夫妻，作主语，谓语动词要用复数。Four couples were on the dance floor.有四对夫妻在跳舞。【2】couple 表示“夫妻二人/夫妇二人”作主语，谓语动词用复数。?The couple have no children. ?夫妻二人没有孩子。The couple were married in 1976.夫妻二人于1976年结婚。备注：网友给出英语句子属于第1种用法