"He has already gone home."

Translation: 他已经回家了。

[Slade366]

Why don't we use 完？

[ThieumL]

完 means to complete, finish (doing) something. You can't use it here

[XiyS9M]

it's surprising though to a beginner. did complete going home.

[linda437018]

can 回家 be separated, like 回了家? or is it no way?

[VaVuthea]

Can i put 了 in the middle?
他已经了回家。

[Zed_DUO]

No, because "le" has to go after the verb

[maartendoc]

已 (yǐ) = already/to stop/then
经 (jīng) = sacred book/to undergo/to endure

已经 (yǐjīng) = already