“和某人发生冲突”常见的英语表达有：
have a conflict with sb.：这是最直接、常用的表达。例如：I had a conflict with my colleague yesterday.（我昨天和同事发生了冲突。）
get into a conflict with sb.：侧重于描述进入冲突的状态。例如：He got into a conflict with his neighbor over a parking issue.（他因为停车问题和邻居发生了冲突。 ）
clash with sb.：这个短语强调观点、利益等方面的激烈碰撞而产生冲突。例如：The two leaders clashed with each other at the meeting.（两位领导人在会议上发生了冲突。 ）