Tom often spends as much time as he can to learn English.为什么要用to learn
问题描述：
Tom often spends as much time as he can to learn English.为什么要用to learn
为什么不能用(in) doing
答
spend 主语是人 1.sb.spend……on sth.2.sb.spend……(in) doing sth.例如：He spent twenty yuan on the book.he spent two hours (in) finishing the work spend ...to do 没学过,在这 是表目的吧,感觉布太对 啊....