我同意用英语怎么说口语

"I agree" 的英语口语表达是 "I'm with you" 或 "I agree with you"。这是一种常用的口语表达方式，在日常英语交流中经常使用。

例句：

"I'm with you on that idea." (我同意你的想法。)
"I agree with you, we should definitely try that new restaurant." (我同意你，我们应该去那家新餐厅试试。)