Restriction need not occur only between the grammatical subject and predicate. It can constrain the agent of an act, its object, or another complement such as a time or place.
RelationExampleQuestion resolved
Verb–agentmā qāma illā ZaydWho stood?
Verb–objectmā ḍaraba Zayd illā ʿAmranWhom did he strike?
Verb–adjunctmā sāfartu illā laylanWhen did I travel?
For each sentence identify the relevant relation instead of imposing one general interpretation on the particle illā.