新牛津英语词典中commit词条有一个例句：
They we were reluctant to commit themselves to an opinion.
我想问一下，commit oneself to 直接接sth而不接动名词的使用方法应该怎么样理解？是介词to后省略了一个动名词吗？还是to后接的名词应该有潜在的动词含义？期望老师解答，谢谢老师！
既然是介词，to 接名词正常，接动名词也正常。
If you commit yourself to something, you say that you will definitely do it. If you commit yourself to someone, you decide that you want to have a long-term relationship with them.
commit oneself to something：承诺、致力于某事（something 可以没动词意义）
commit oneself to doing something：承诺、致力于做某事
假如to 后面的名词词义明确，那样，动名词就能省下不说。如网友的句子：
Theywere reluctant to commit themselves to （giving）an opinion.
