1.pay for sb/sth和spend.doing sth, spend.on sth的用法

1.pay for sb/sth和spend.doing sth, spend.on sth的用法 spend的用法spend 一般不就用在spend on sth 和spend (in) doing sth spend spend doing sth和spend on sth spend on sth 和spend doing sth的意思 sb spend + doing sth spend on sth 等于spend doing sth spend doing sth.和 spend on sth.有什么区别? spend time on sth 和spend time in doing sth 用法和区别 spend time in doing sth和spend time on doing sth的区别 sb spend sometime in doing和sb spend sometime on sth各造两个句子,一共 有spend.on doing sth spend ...on(in) doing sth ----------------------------------