我想唱歌和跳舞 应该是 i want to sing and to dance 还是 i want to sing an

i want to sing and to dance 原则上语法上没错,但一般不会这么说话的.
都是采用i want to sing and dance这种形式,省略第二个to,你如果查找语法书,也会发现这条规则.
我是英语专业的,