1 Kings 2:44

Thou knowest The Hebrew inserts the pronoun emphatically. It was needless for Solomon to recall the wrong with which Shimei's own conscience would upbraid him.

the Lord shall return The Hebrew says -the Lord hath returned." The punishment is so sure that the king speaks of it as already inflicted. He is but the Lord's agent, and the doom of Shimei is counted as executed. This appears the best way of understanding the grammar, as there is no preceding verb from which this should derive the signification of an imperfect.