amruhu
His Command
N – nominative masculine noun + PRON – 3rd person masculine singular possessive pronoun ha
Root Link: ا م ر
lahu
to it
P – prefixed preposition lām + PRON – 3rd person masculine singular personal pronoun hu
Root Link: ل
fayakūnu
and it is
CONJ – prefixed conjunction fa (and) + V – 3rd person masculine singular imperfect verb
Root Link: ك و ن