Shall we take a taxi?I would rather we ______,you know ,as excercise.

would rather+从句,是一个常用的虚拟语气句型.
Would rather+从句,谓语一般用过去时来表示现在或将来.其意为“宁愿……,还是…… 好些”“一个人宁愿另一个人做某事”.引导从句的that常省略.在谈到过去的动作时,谓语则用过去完成时.
【例】We’d rather he paid us the money tomorrow.我们宁愿他明天付给我们那笔钱.