Question

I her for a long time. (known, am knowing, know)

Answer 1

Answer:

$\huge\bf\underline{\red{A}\green{N}\orange{S}\pink{W}\purple{E}\blue{R}}$

I know her for a long time.

$\huge{\red{\star}}$For more information , "known" is preferred with participle tenses and"am knowing" is referred to continuation of time. So "know" is the correct answer.