Question

I Knew him long before, (Interrogative)

Answer 1

"I knew him for a long time would be the simplest and most direct way to use the past tense of "know" in the sentence. "

Answer 2

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

$\underline\mathtt\gray{↬did \: you \ know \ him\ long \: before?}$

Explanation:

$\underline\green{ INTERROGATIVE \: SENTENCES - }$

✦An interrogative sentence is one that asks a direct question and always ends in a question mark. The term "interrogative sentence" is another name for a question.

$\huge{\bf{\sf{{\color{navy}{th}}{\purple{an}}{\pink{k \: }}{\color{pink}{u}}}}}$