spend sth to do sth对吗

spend sth to do sth对吗 1.spend st on doing sth;spend st doing sth;spend st to do st spend to do 和spend for sth 有何区别? suggest to sb to do sth对吗? text sb about sth text sb to do sth对吗 why not to do sth对吗?waiting 请问must to do sth?句型对吗? let sb to do sth 对吗?为什么 decide sb to do sth对吗 follow sb to do sth对吗 英语语法：是spend some time doing sth.还是spend some time to do sth. spend time in doing sth 和spend time to do sth有什么区别?