He already knew it? vs He already know it?

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

Is this correct to write - “He already KNEW it?”

OR

“He already know it?”

Thanks,
Suresh

2

Is this correct to write - “He already KNEW it?” [color=darkred]Yes. He knew it before I told him
OR
“He already know[color=red]s it?” [color=darkred]is also correct. I do not have to tell him; he already knows it.
[color=darkred]You can write either one depending on your context.