when I was a child,I use to spend a lot of time playing games with my friends.
spend time doing sth 花时间做某事
spend time on sth 把时间花在某物/某事上
when I was a child,I use to spend a lot of time playing games with my friends.
spend time doing sth 花时间做某事
spend time on sth 把时间花在某物/某事上