The -in patient-voice family selects an affected, created, consumed, or otherwise targeted participant as the pivot. That pivot normally takes ang/si, while the actor takes ng/ni or an ng-form pronoun such as ko or mo. Patient voice is an ordinary Filipino alignment—not a marked equivalent of the English passive.
The name -in family is conventional. The basic form often ends in -in or -hin, but completed and incompleted forms usually replace that suffix with an infix or prefix, while contemplated forms retain a suffix. The aspect-and-voice family overview explains why one root needs a whole row rather than one citation form.
The family across aspect
| Root | Basic | Completed | Incompleted | Contemplated | Selected patient |
|---|---|---|---|---|---|
| sulat | sulatin | sinulat | sinusulat | susulatin | a text to compose |
| basa | basahin | binasa | binabasa | babasahin | reading material |
| luto | lutuin | niluto | niluluto | lulutuin | food to cook |
| ayos | ayusin | inayos | inaayos | aayusin | something to arrange or repair |
| bili | bilhin | binili | binibili | bibilhin | something to buy |
The table exposes several operations. -In follows a consonant-final root in sulatin; -hin surfaces in basahin; final o becomes u before the suffix in lutuin; and common bilhin contracts the shape of bili. These forms are neutral contemporary Filipino. There is no safe instruction to “add -in” without learning the actual surface form.
Basahin mo ang abiso bago ka magtanong sa punong-guro.
Read the notice before you ask the principal.
Aayusin ng karpintero ang maluwag na bisagra bukas.
The carpenter will fix the loose hinge tomorrow.
The basic basahin is natural in a command. Contemplated aayusin presents an unbegun repair. Both select an ang-marked patient, while mo and ng karpintero are non-pivot actors.
Patient pivot and actor non-pivot
The marker pattern is the visible partner of the verb morphology:
- patient pivot: ang for a common noun, si/sina for personal names;
- actor non-pivot: ng for a common noun, ni/nina for names, or an ng-form pronoun;
- locations, goals, and beneficiaries: commonly sa/kay phrases when the lexical verb licenses them.
Tinapos ni Farah ang badyet bago ang tanghalian.
Farah finished the budget before lunch.
Pinili ng komite si Andres bilang bagong ingat-yaman.
The committee chose Andres as the new treasurer.
In the first sentence, the budget is pivot and Farah is actor. In the second, a person can be the patient pivot: si Andres is selected by pinili, while ng komite expresses the actor. “Patient” is a semantic label broader than “inanimate object.”
The patient-voice marker guide gives the full marker map.
Patient voice is not the English passive
English often translates a Filipino patient-voice clause with an active clause because that is the natural English packaging.
Kinuha ni Lino ang payong sa tabi ng pinto.
Lino took the umbrella beside the door.
Nothing in this neutral Filipino sentence suggests a marked passive such as “The umbrella was taken by Lino.” The verb selects ang payong as pivot, and the actor is freely expressed as ni Lino. Predicate-first order is also neutral; no ay is required.
Patient pivots are frequently identifiable because speakers choose this voice while tracking a particular affected item. Yet ang is not simply “the,” and patient voice is not a definiteness switch:
Iniinom sa ilang tahanan ang salabat kapag malamig ang panahon.
Ginger tea is drunk in some households when the weather is cold.
Here ang salabat denotes a kind generically, and the actor is left general. The clause remains patient voice because the consumed item is the pivot.
Same event, different pivot
Compare two completed clauses built from luto:
Nagluto si Ogie ng pansit para sa pagpupulong.
Ogie cooked noodles for the meeting.
Niluto ni Ogie ang pansit na dinala sa pagpupulong.
Ogie cooked the noodles that were taken to the meeting.
Nagluto is actor voice: si Ogie is pivot and the noodles are ng-marked. Niluto is patient voice: ang pansit is pivot and Ogie becomes ni Ogie. Both describe an intentional actor and a cooking event. The contrast is not active versus passive in the English sense; it is a difference in Filipino alignment and discourse organization.
Distribution is lexical, not “any object”
The -in family often selects a patient substantially affected or delimited by the event: food is consumed, a task is finished, an item is made, or material is altered. It can also select a target such as a person obeyed or visited, so physical change is a tendency rather than a definition.
Susundin namin ang payo ng doktor habang nagpapagaling si Tatay.
We will follow the doctor's advice while Father recovers.
Not every English transitive verb corresponds to an -in verb. Filipino conventionally uses buksan for “open the selected thing,” hugasan for “wash the selected thing,” and ibigay for “give the selected thing.” Invented buksin, hugasin, and bigay-in are not neutral standard forms.
A root is a family of constructions, and one citation form hides the derivational system. Sulat supports magsulat/sumulat with an actor pivot, sulatin with a selected text, isulat with selected content put into writing, and sulatan with an endpoint such as an addressee. Their English glosses overlap, but their valency and pivot choices differ.
Some families show accepted variants. Both dakpin and dakipin “arrest/catch” occur in contemporary Filipino; the shorter form is common, while speakers and edited texts also use the transparent longer form. This variation is root-specific, not permission to contract every -in verb.
Negation, questions, and connected use
Hindi ko binili ang pulang bag dahil sira ang siper.
I did not buy the red bag because its zipper was broken.
The actor clitic ko follows the first word hindi. Completed binili still identifies the denied event as a bounded patient-voice event.
—Babasahin mo ba ang panukala ngayong gabi? —Oo, at isusulat ko rin ang mga tanong ko.
—Will you read the proposal tonight? —Yes, and I'll also write down my questions.
The question uses contemplated babasahin and patient pivot ang panukala. The reply uses an i- family, isusulat, because the selected content is being put into writing. Actual conversation moves between voice families according to what is selected.
Common Mistakes
Treating patient voice as English passive morphology
❌ Ay niluto ni Cora ang sopas para sa mga bata.
Incorrect — ay cannot stand alone at the beginning of this clause, and patient voice does not require it.
✅ Niluto ni Cora ang sopas para sa mga bata.
Cora cooked the soup for the children.
Predicate-first order is neutral. A complete marked inversion would require a fronted topic, as in Ang sopas ay niluto ni Cora, but patient voice itself does not require ay merely because English can use “was.”
Keeping actor-voice markers
❌ Sinulat si Mateo ng liham para sa punong-guro.
Incorrect alignment — sinulat selects the text as pivot, not Mateo.
✅ Sinulat ni Mateo ang liham para sa punong-guro.
Mateo wrote the letter for the principal.
The correction changes both markers to match patient voice.
Adding the suffix to every form
❌ Binasahin ni Pilar ang tala bago umalis.
Incorrect — completed aspect replaces suffixal -hin with completed patient-voice morphology.
✅ Binasa ni Pilar ang tala bago umalis.
Pilar read the note before leaving.
Basahin is basic; binasa is completed. They are members of one family, not a stem plus an invariant ending.
Inventing -in from an English gloss
❌ Buksin mo ang kabinet para makuha ang gamot.
Incorrect in standard Filipino — bukas selects a different patient-voice family.
✅ Buksan mo ang kabinet para makuha ang gamot.
Open the cabinet so you can get the medicine.
The -an form is lexically established here. English “open” cannot predict the Filipino affix.
Key Takeaways
- The -in family selects a patient or target as pivot and marks the actor as non-pivot.
- Its surface morphology shifts across aspect: suffixal basic, infixed or prefixed completed/incompleted, and reduplicated suffixal contemplated forms.
- Patient voice is not the English passive and does not require ay or an omitted actor.
- Affectedness and specificity are strong tendencies, not mechanical definitions.
- Learn every root as a family of forms and participant frames, including irregular forms and accepted variants.
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Start learning Filipino →Related Topics
- Verb Paradigms as Aspect-and-Voice FamiliesA2 — Read Filipino verb paradigms as intersecting choices of event aspect and participant voice rather than as English tense conjugations.
- Multiple Possible Verbs from One RootA2 — Explore how one Filipino root can support several established verbs with different voices, participant frames, aspect paradigms, and lexical meanings.
- Marker Choice with Patient-Voice VerbsA1 — Choose ang, ng, and personal markers with patient-voice verbs by treating the patient as pivot and the actor as non-pivot.
- The -in- patient voice: Completed-Aspect FormationB1 — Form completed -in patient-voice verbs through infixation or prefixation while preserving the patient-pivot marker pattern.
- The -in- patient voice: Incompleted-Aspect FormationB1 — Build incompleted -in patient-voice forms through infixation and reduplication for ongoing, habitual, and backgrounded events.
- Choosing -in- versus -anB1 — Choose -in or -an families by deciding whether the pivot is an affected patient, endpoint, location, addressee, surface, or lexical patient-like target.