When answering this question, you can talk about the typical age or stage when children start to form their own opinions. Usually, children begin to develop independent thinking and personal preferences during early childhood, especially around the age of 5 to 7, when they start school and interact more with others. You can also mention that as children grow older and gain more experiences, their opinions become stronger and more independent. It’s also good to point out that every child is different, so the exact age can vary.

回答这个问题时，你可以谈谈孩子开始形成自己观点的典型年龄或阶段。通常，孩子在儿童早期，特别是大约5到7岁左右开始上学并更多地与他人互动时，会开始发展独立思考和个人喜好。你还可以提到，随着孩子长大并积累更多经验，他们的观点会变得更坚定和独立。同样需要指出的是，每个孩子都不同，因此确切的年龄可能会有所不同。