小时候，我很顽皮，忘记了妈妈交代过的事情。有一次，我回家很晚，当我看到妈妈时，她先是微笑，然后马上就生气了，因为她以前告诉我，如果我回家晚了，就必须提前告诉她。

As a child, I am very naughty and forget about what my mother tells me. One time, I go back home very late. When I see my mother, she smiles at first and then turns angry, because she has told me before if I go home late, I must tell her in advance. I let my mother heart-broken. I feel sorry and promise it won’t happen again. 
小时候，我很顽皮，忘记了妈妈交代过的事情。有一次，我回家很晚，当我看到妈妈时，她先是微笑，然后马上就生气了，因为她以前告诉我，如果我回家晚了，就必须提前告诉她。我让妈妈心碎了，我感到非常抱歉，并承诺不会再发生这种事了。