Third, I'm a forgetful person.

第三，我很健忘。

youdao

You have to remind him once again. He is a forgetful person.

你必须再次提醒他。他是很善忘的人。

youdao

You are always forgetting your assignment. You are a very forgetful person.

解析：“你经常忘记自己的任务，你是个非常健忘的人。”

youdao

A person may become more forgetful or find it harder to think clearly.

VOA: special.2009.03.24

It's important to remember that the person isn't acting forgetful or difficult to hurt family members or caregivers, aging experts said, and they can still pick up on negative reactions, even if they don't understand why.

CNN: Building relationships amid memory loss