孩子的行为往往给人留下了任性的印象。他们会因为自己的想法和需求而表现出一些特殊的行为，这些行为可能会让成年人感到困惑或者反感。下面是一些描述孩子任性的句子：

1. The child can be quite stubborn when he doesn't get his way.

2. When she doesn't want to do something, she'll put up a fight and refuse to budge.

3. He has a tendency to throw tantrums when he's upset or doesn't like something.

4. She can be very demanding and demanding attention from everyone around her.

5. He's very high-spirited and often doesn't listen to instructions or rules.