i spend 20 minutes in getting to school 为什么get 要加ting

题目

i spend 20 minutes in getting to school 为什么get 要加ting

答案

Spend sth (in) doing Sth,固定用法,花费时间、金钱做某事.
Spend sth on sth 在·····上花费时间、金钱.