The system of personal pronouns in Esperanto corresponds directly to the English one. The pronouns are used in pretty much the same way as in English, so all you need to do is to learn the words:
|1st||mi (I)||ni (we)|
There is no distinction between singular and plural (and formal and informal) “you”. Although there is a singular informal pronoun “ci”, which is basically equivalent to English “thou”, you can safely ignore it unless you intend to write poetry or translate the Bible.
The accusative case
In English, when someone or something is the direct object of an action, the pronoun is in the so-called accusative. For example:
I like her (not “I like she”)
he informs me (not “he informs I”)
she has them (not “she has they”)
“Him” is the accusative of “he”, “her” is the accusative of “she”, “me” is the accusative of “I”, and “them” is the accusative of “they”. It works the same way for pronouns in Esperanto, but the accusative of every pronoun is formed by simply adding the suffix -n (you don’t have to memorize different words for different pronouns):
|1st||min (me)||nin (us)|
The examples above can be translated as:
mi ŝatas ŝin (I like her)
li informas min (he informs me)
ŝi havas ilin (she has them)
Attention! Forms like “me” and “him” have other uses in English in addition to the accusative. Most notably, they are used after a preposition, e.g. “for me”, “to him”, “without her”. This is not the case in Esperanto!
The accusative case in Esperanto is only used in direct objects (when a pronoun is the “target” of an action). In all other cases, the basic form, without -n, is used. Here are a few examples:
to him = al li (not al lin)
without her = sen ŝi (not sen ŝin)
Transforming personal pronouns into possessive ones is really easy in Esperanto. All you have to do is add the suffix -a:
|1st||mia (my, mine)||nia (our, ours)|
|2nd||via (your, yours)|
ŝia (her, hers)
|ilia (their, theirs)|
As you can see, there is no distinction between standalone possessive pronouns and possessive pronouns preceding a noun, e.g.
That is my book. It is mine.
When a possessive pronoun modifies a noun that is in the accusative, it also gets the accusative suffix -n:
He has my book.
Similarly, when the noun is in the plural, it takes the plural suffix -j:
Her books are interesting.
This is because possessive pronouns behave exactly like adjectives in Esperanto.
The reflexive pronoun
English has a separate reflexive pronoun for every personal pronoun:
You wash yourself. (not you wash you)
He washes himself. (not he washes him)
She washes herself. (not she washes her)
However, if you think about it, the distinction only matters in the third person (he, she, it, they). “I wash me” and “you wash you” are completely intelligible; they just do not sound natural.
That’s why the -self version is normally only used in the third person in Esperanto, and for simplicity, it does not even depend on gender and number and is always just “si” (or “sin” in the accusative).
The table below demonstrates this using the verb lavi (“wash”):
|1st||mi lavas min|
I wash myself
|ni lavas nin|
we wash ourselves
|2nd||vi lavas vin|
you wash yourself / yourselves
li lavas sin
he washes himself
ŝi lavas sinĝi lavas sin
she washes herself
it washes itself
|ili lavas sin|
they wash themselves
The distinction between “si” and doubling the pronoun is the same as in English:
Li lavas sin = he washes himself.
Ŝi lavas sin = she washes herself.
The version without -n is used after a preposition, for example:
He bought it for himself.
Possessive reflexive pronoun: sia
When it comes to possessives in the third person, we have to distinguish between the objects belonging to a different person and objects belonging to the same person. Let me explain that with a few examples:
Li lavas sian katon. = He washes his (own) cat.
Ŝi ŝatas sian libron. = She likes her (own) book.
Ili lavas sian hundon. = They wash their (own) dog.
Indefinite pronoun: oni
“One” can be used as an indefinite pronoun in English, as in “one can clearly see that this is wrong”. The Esperanto equivalent of this pronoun is “oni”:
One can clearly see that this is wrong.
“Oni” can be used in any such indefinite context, but another phrasing is usually preferable in English, for example:
People say that French is beautiful.
(Lit.: One says that French is beautiful.)
These videos are called “vlogs”.
(Lit.: One calls these videos “vlogs”.)
This article covered virtually everything you will ever need to know about pronouns in Esperanto. Two topics not covered here are relative and interrogative pronouns. The reason is that Esperanto uses its own system of so-called correlatives, which substitute these types of pronouns.