agree to sth 这里的to 是介词,agree to do sth 这里的to 是动词不定式标志.不定式标志to 后面要接动词原形.After much argeement most of his proposals were finally agreed to.这个句子是被动语态,因为我们需要说agree to his proposals ,所以这个to 不能省略.Father agreed to my becoming an engineer.其实就是agree to sth这个词组,不过这里宾语是动名词充当的.