Instrument / Mediator
With what or through what does it happen?
Significado
The tool, medium, body part, system, channel, or mediator used to perform or transmit the action.
Como identificar
Ask what tool or channel makes the action possible.
Exemplos
knife|phone|car|email|hand
with a knife|by email|through the app
He cut the bread with a knife.
Visual guide
Actor │ uses ▼ Instrument / mediator │ makes possible ▼ Action He cut bread with a knife.
Same role, different shapes: with a knife (preposition) knife-CASE (case ending) by email (medium) through the app (channel) hand + cut (bare/compound) Ask: with/through what?
Vista por língua
Na tua língua materna
Instruments and means are usually introduced with com, por, de, or fixed lexical patterns.
Ele cortou o pão com uma faca.
He cut the bread with a knife.
Na tua língua de aprendizagem
English usually expresses instruments with prepositions, especially with.
She cut the bread with a knife.
with a knife = instrument
Learners may choose the wrong preposition or omit the instrument marker.
Same block, different coding
Both languages use this block strongly, but they signal it differently. Focus on form changes, not only meaning.