came to和come to区别

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.