He already knew it? vs He already know it?

[Sureshvemuri]

Is this correct to write - "He already KNEW it?"

OR

"He already know it?"

Thanks,
Suresh

[Milanya]

Is this correct to write - "He already KNEW it?" Yes. He knew it before I told him
OR
"He already knows it?" is also correct. I do not have to tell him; he already knows it.
You can write either one depending on your context.
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con·text - The part of a text or statement that surrounds a particular word or passage and determines its meaning.