agree的过去式是：agreed。以不发音的e结尾的单词，变过去式是在词尾加d，agree是以不发音的e结尾，所以直接加d变成过去式agreed。agree既可用作及物动词也可用作不及物动词，作及物动词时意为同意，赞成，承认，约定，商定；作不及物动词时意为同意，意见一致，约定，商定。
agree造句：
1、When he said that, I had to agree.
他说了那话，我只好同意。
2、We agreed the proposal was a good one.
我们一致认为这个建议不错。
3、The great majority of people seem to agree with this view.
大多数人似乎都同意这种观点。