遇到此类问题，最有效的办法就是查词典。

1 worry作担心、担忧解时，是不及物动词。可以单独使用，也可后接about介词短语引出担心的内容（对什么感到担心、担忧）。例如：

Don't worry.

He worried about her health.

2 worry还可以是及物动词，宾语为某人或自己，意为使某人或自己感到担忧、担心。此时主语为某事、不定式或that从句。例如：

What worries me is how I am going to get another job.

It worries me that he hasn't come home yet.

It worried me to think what might happen.

3 be worried about为系表结构，worried为形容词，表示某人处于担心、担忧某人或某事的状态中。例如：

He is worried about his future.

综合以上三种用法，我们可以判断网友的三个句子：

You don't have to worry about me. I'm a good swimmer. 正确

You don't have to worry me. I'm a good swimmer.错误。这个句子表示的是“你不必使我担心”，这不符合上下文逻辑。

You don't have to be worried about me. I'm a good swimmer. 正确，意义接近第一句。