has known vs. is known

English as a Second Language English Vocabulary, Grammar and Idioms
1

Let me quote an example.

She is known to be a stingy person
vs.
She has known to be a stingy person

Is there any difference?

Thanks.

2

She is known to be a stingy person … is the correct form Rocky.

She has BEEN known to be stingy in the past, but she is a very generous person nowadays.

3

Thanks coach. I have another question by the way.

A.She has been Known to be stingy in the past.

vs.
B.She was known to be stingy

Is the sentence above in passive form while the one below in active form?

Can I say Sentence A is implying that She has been known by everyone that she is stingy while Sentence B is telling us about her “state” instead of her being stingy for a time period?

Thanksssss.