初级：

I have a pet dog. Its name is Max. Max is very friendly and loves to play with me. I take him for walks every day and he always makes me happy.

中级：

I have a pet dog named Max. He is a golden retriever and has been with me for five years. Max is very loyal and always follows me around. I enjoy taking him for long walks in the park and playing fetch with him.

高级：

My beloved pet dog, Max, is a golden retriever who has been a part of my life for five years. He is not just a pet, but a loyal companion who brings me joy and comfort. Max loves to go on adventures with me, whether it's hiking in the mountains or simply lounging in the backyard. I cherish every moment spent with him and consider him a cherished member of my family.