Question

I played games with my brother at 9:00

Answer 1

第一句你是想强调“i”,但是不能写成“i”,而是“me”.

而且后面的从句就缺少了主语,所以应改为 It was me who played games with my brother at 9:00.

第二句你是想强调和哥哥一起玩,所以应该成 It was my brother that i played games with at 9:00.

仅供参考