came to和come to的区别在于它们的时态不一样。came to中动词came是come的过去式，所以came to用于一般过去时态。而come to这个短语中come是原形，可以用于一般现在时态主语非第三人称单数的情况中。
如：They came to Shanghai yesterday.和They come to Shanghai every year.
区别就是came to是动词come to的过去时态，具体的不同如下
came to中文意思是v. 想起；共计，来到
In my dream all my toys came to life.我的玩具在梦里都活过来了。
The meal with wine came to $20 each.包括酒这顿饭每人20块钱。
Sleep came to him in brief snatches.他时睡时醒。
come to中文意思是v. 想起；共计
