ni for Singular Personal Non-Pivots | Filipino Grammar

Ni marks one personal name or name-like title in a non-pivot function. It commonly marks the actor in a patient-voice clause and the possessor after a noun: binuksan ni Lila “Lila opened it,” payong ni Ruben “Ruben's umbrella.” It is the personal counterpart of ng, not a universal translation of English of or apostrophe-s.

Where ni fits in the marker system

Phrase function	One named person	Common-noun counterpart	Example
Pivot	si Lila	ang guro	dumating si Lila
Non-pivot participant	ni Lila	ng guro	binuksan ni Lila
Possessor or source	ni Lila	ng guro	susi ni Lila
Oblique, recipient, or destination	kay Lila	sa guro	ibinigay kay Lila
Plural personal non-pivot	nina Lila at Ben	ng mga guro	bahay nina Lila at Ben

Because English personal names are normally unmarked, English speakers may try to use si everywhere or omit the marker. Filipino instead changes the form as the phrase's grammatical function changes.

Ni as the actor under patient voice

Voice determines which participant is pivot. In actor voice, the named actor takes si:

Nagbukas si Lila ng bintana dahil mainit sa silid.

Lila opened a window because the room was hot.

The actor-voice verb nagbukas selects si Lila as pivot, while ng bintana is a non-pivot patient.

Patient voice organizes the same kind of event around the patient:

Binuksan ni Lila ang bintana dahil mainit sa silid.

Lila opened the window because the room was hot.

Now ang bintana is the patient pivot selected by binuksan. Lila remains the actor semantically, but ni Lila marks her as non-pivot. This is not an English passive: the natural translation still has “Lila” as its subject.

Nilinis ni Amado ang kusina bago dumating ang mga bisita.

Amado cleaned the kitchen before the guests arrived.

The identifiable person in ni Amado is still specific. Ni marks role, not indefiniteness. Calling it “of Amado” would hide the fact that it marks the actor selected by this verbal construction.

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With a patient-voice verb, find the ang/si patient pivot first. A singular named actor then normally appears with ni: binasa ni Mara ang liham, sinundo ni Leo si Ana.

Ni inside a possessive noun phrase

After a possessed noun, ni introduces one named possessor.

Nasa kotse ang payong ni Ruben.

Ruben's umbrella is in the car.

The full pivot is ang payong ni Ruben. Its head is payong, and the internal phrase ni Ruben identifies the possessor. English puts the possessor first with apostrophe-s; neutral Filipino puts the possessed item first.

Malinaw ang paliwanag ni Propesor Villanueva tungkol sa takdang-aralin.

Professor Villanueva's explanation of the assignment is clear.

A title plus surname can function as one personal expression, so ni precedes the whole unit. With a common-noun description instead, use ng: paliwanag ng propesor “the professor's explanation.” This contrast depends on name-like use, not capitalization alone.

Possessive ni covers more than legal ownership. It can identify authorship, source, kinship, or another conventional association:

Narinig mo ba ang bagong awit ni Celso?

Have you heard Celso's new song?

Celso may be the writer, performer, or person contextually associated with the song. The marker does not settle that relation by itself.

For longer phrases and possessor order, see possession inside the noun phrase.

Non-pivot does not always mean actor or possessor

Some predicates assign a named experiencer or affected person the ni form. The pattern belongs to the predicate construction; it should not be forced into one English preposition.

Gusto ni Sabel ang tahimik na silid sa dulo ng pasilyo.

Sabel likes the quiet room at the end of the corridor.

Kailangan ni Arturo ng tulong sa paglipat ng mga kahon.

Arturo needs help moving the boxes.

In the first sentence, the liked room is the ang phrase and Sabel is the experiencer. In the second, ni Arturo identifies the person with the need, while ng tulong names what is needed. These are standard predicate patterns, not patient-voice clauses mechanically built from English like and need.

This broader distribution is why “ni equals by” is also inadequate. It can translate English by in some patient-oriented clauses, apostrophe-s in possession, or no separate word at all.

Negation and questions preserve phrase function

Negation does not change the actor's role under patient voice.

Hindi dinala ni Carmina ang mga dokumento sa pulong.

Carmina did not bring the documents to the meeting.

Hindi negates the predicate dinala; ni Carmina remains its non-pivot actor.

Possession questions reveal an important contrast between an internal possessor and a predicate of ownership:

Kanino ang pulang bag? — Kay Liza iyon; bag ni Liza ang nasa tabi ng pinto.

Whose is the red bag? — It belongs to Liza; the bag beside the door is Liza's.

The short predicate answer uses kay Liza, roughly “Liza's / belonging to Liza.” Inside the noun phrase bag ni Liza, the possessor takes ni. English uses the same possessive idea in both places, but Filipino distinguishes construction and role.

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Do not choose ni from the English translation. Choose it when one personal name occupies an ng-type role: a non-pivot selected by the predicate or a possessor inside a noun phrase.

Names, titles, and number

Ni can mark a given name, full name, nickname, surname, or a kinship/title expression functioning as a personal name: ni Ana, ni Ana Cruz, ni Bunso, ni Kuya Ramon. Names of cities, institutions, books, and events normally use the common series, even when capitalized.

For two coordinated names or one name representing an associated group, use nina:

Pinirmahan nina Elsa at Vic ang kasunduan kahapon.

Elsa and Vic signed the agreement yesterday.

Repeating singular ni is possible—ni Elsa at ni Vic—especially when treating the people separately. One nina presents them as a single coordinated group.

Common Mistakes

1. Using ng before a personal name. The singular personal non-pivot counterpart of ng is ni.

❌ Tinapos ng Rosa ang ulat bago magtanghali.

Incorrect — Rosa is a personal-name actor in a patient-voice clause.

✅ Tinapos ni Rosa ang ulat bago magtanghali.

Rosa finished the report before noon.

2. Keeping si on the actor under patient voice. Si marks a personal pivot, not every occurrence of a name.

❌ Isinara si Mateo ang tindahan nang maaga.

Incorrect — patient-voice isinara selects the store as pivot.

✅ Isinara ni Mateo ang tindahan nang maaga.

Mateo closed the store early.

3. Using ni as a general translation of of. A common-noun possessor takes ng.

❌ Nawawala ang susi ni sasakyan.

Incorrect — sasakyan is a common noun, not a personal name.

✅ Nawawala ang susi ng sasakyan.

The vehicle's key is missing.

4. Using singular ni for one coordinated personal phrase. Use nina once or repeat ni before each name.

❌ Nasa mesa ang mga larawan ni Eva at Nilo.

Nonstandard as one coordinated possessor phrase in careful Filipino — the singular marker ni does not group both names.

✅ Nasa mesa ang mga larawan nina Eva at Nilo.

Eva and Nilo's photographs are on the table.

In careful standard Filipino, the second personal name needs its own ni, or one plural nina must introduce the full coordinate. Nina clearly groups both names as possessors.

Key Takeaways

Ni is the singular personal counterpart of non-pivot or possessive ng.
Patient voice commonly gives ni to a named actor while the patient takes ang or si.
After a noun, ni introduces one named possessor or associated person.
Some experiencer predicates also license ni; the English translation may contain no of or by.
Use nina for a coordinated or associated personal group and kay for a singular personal oblique.

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