1. The problem is about expressing an apology for lying to your mom. 2. When apologizing, it is important to be sincere and acknowledge the mistake clearly. 3. A good formula for apology is: "I am sorry for [what I did]. I understand it was wrong because [reason]. I will try to do better." 4. For example, you can say: "Mom, I am sorry for lying to you. I understand that honesty is important and I should have told the truth. I will be honest from now on." 5. This approach shows responsibility, understanding, and commitment to change, which helps rebuild trust.