Cant lie_不能撒谎英语

Today, drawing, mother asked me the blue pen before come from? I lie to mother said: "was given to me by someone else." Mother kept asking me, I had to tell mother is sister three dollars to buy my, mother said to me: "kid, mother not to say that before you buy something first get after father or mother agreed to buy, and I cant lie a lie." I can listen to, immediately lower the head and said: "mom I later no longer lying cheating." Mother said: "say can change is a good boy."