إِنَّ زَيْدًا لَقَادِمٌ
Zayd certainly is coming.
Here the emphatic lām appears before the predicate “قَادِمٌ” after inna. In this arrangement it is also called lām muzahlaqah, because the original initial emphatic lām is shifted to the predicate's position when inna is introduced.
Syntax: “زَيْدًا” is the accusative noun of inna; the lām emphasizes the nominative predicate “قَادِمٌ.”
“زَيْدٌ قَادِمٌ” is an unreinforced report, whereas “إِنَّ زَيْدًا لَقَادِمٌ” combines two conspicuous emphatic elements.