Doer or cause
Who or what makes it happen?
Meaning
The doer or cause is the person or thing that carries out an action or makes something happen. It can be a person acting on purpose or something such as wind bringing about a change. Languages show this role through word order, endings, or context, and not all have a special marker for it. Cause explains why something happens, while this block identifies who or what brings it about.
How to spot it
Ask who carries out the action or what brings about the event, rather than assuming it is the first person or thing mentioned.
In your native language
In an ordinary English statement about an action, the doer or cause is usually the subject and comes before the verb. The subject can be a person, an animal, or a thing. In a passive sentence, which presents an action from the receiving side, the doer can appear after by or remain unnamed.
Tom washed the dishes.
Tom carries out the action and is the subject.
The sun melted the snow.
The sun causes the change without acting on purpose.
We moved the table.
We names the people who carried out the action.
In your learning language
The doer or cause is usually the subject in Spanish, and the verb changes form to match it. The subject can be a person or a nonhuman cause, and it can come before or after the verb. When the doer is understood, a verb ending can identify them without a separate pronoun.
Lucía prepara la cena.
Lucía is making dinner.
El viento cerró la ventana.
The wind closed the window.
The subject names the cause, not someone acting deliberately.
Llegamos temprano.
We arrived early.
The verb form identifies the arriving group as we without nosotros.
Learners whose language requires an explicit subject may repeat pronouns unnecessarily. Learners whose language has fixed subject-first order may assume that a participant after the verb cannot be the doer.