method后面可以加to吗

可以，例如：

1、They need a reliable method to decrease the divorce rate.他们需要一个可靠的办法来降低离婚率。

2、He devised a method to ease the traffic jams in the city.他发明出一种缓解该市交通拥堵的方法。

3、The method to be used in debates is to present the facts， reason things out， and persuade through reasoning.辩论的时候，必须采取摆事实，讲道理，以理服人的方法。