是learn to do sth 还是learn doing sth 快

learn+to do sth 还是 doing sth learn to do sth,还是learn doing sth 请问learn to do sth.是否等于learn doing sth. 有learn doing 等于learn to do sth 是learn to sth还是learn sth (learn English or learn to English) learn 用法learn doing sth 这种用法有没有?急用,learn to do sth 和learn do 我想知道 learn to do sth.和learn doing sth 的用法和区别 learn to do sth造句 learn to do sth.造句 learn sth from sb Learn to do sth 造句 learn to do sth. 和learn sth. 的区别 7.learn to do 还是learn doing