I have to take my brother to baseball practice.
A stupid reason that people use to get out of anything. It's like your brother is the most important person in the world, and you're just a slave to him.
I have to take my brother to baseball practice. I can't help you finish your homework.
I have to take my brother to baseball practice. I can't help you sneak out at night.
I have to take my brother to baseball practice. I can't help you eat all the pizza.