I'm not worried about Tom. I'm worried about Mary.
トムのことは心配していない。メアリーのことが心配だ。
I'm worried about my weight.
体重が心配です。
I'm worried about my weight.
体重が心配です。
I was worried about you.
あなたのことが心配だった。
I was worried that I was going to be late when I missed my train, but I managed to get there just in time!
電車に乗り遅れるのが心配でしたが、なんとか間に合いました!
I was surprised when I got a call from my daughter's workplace, saying that she had suddenly collapsed. She had struck her head, so I was worried, but was relieved when I was notified by the hospital that they had found nothing wrong with her.