clash|clashed|clashes

我无法参加两个会议，因为时间冲突。

I can't attend both meetings because they ___clash.

政府军与叛军发生冲突。

Government troops ___clashed with rebel soldiers.

艾玛的派对和我哥哥的婚礼时间冲突了。

Emma's party ___clashes with my brother's wedding.