Brazilian Portuguese Grammar

3. The unstressed pronouns o, a, os, as change their forms whenever they come after verbs ending in certain consonants and nasal diphthongs. What actually happens?

Verb forms ending in...	The verb...	The pronoun turns into...	Examples	Change
r	drops the r	lo, la, los, las	achar + o	achá-lo
s	drops the s	lo, la, los, las	demos + a	demo-la
z	drops the z	lo, la, los, las	fiz + o	fi-lo
m	*doesn't change*	no, na, nos, nas	cantam + as	cantam-nas
ão	*doesn't change*	no, na, nos, nas	compõe + os	dão-nos
õe	*doesn't change*	no, na, nos, nas	compõe + os	compõe-nas
Enclitic pronouns are always joined to the verb with a hyphen.

4. Only use Portuguese stressed pronouns after prepositions:

Tonic Pronoun	Example	English
mim	Ele pensa em mim.	He thinks about me.
ti	Gosto de ti.	I like you.
ele	Envie a mensagem a ele.	Send then message to him.
ela	Não conte mentiras a ela.	Don't tell lies to her.
nós	Ela olhou para nós.	She looked at us.
vós	Eles olharam para vós.	They looked at you (guys).
eles	Fiz isso por eles.	I did it for them.
elas	Fiz isso por elas.	I did it for them.

5. The stressed pronouns ele, ela, eles, elas combine with prepositions de and em:

ele

ela

eles

elas

dele

dela

deles

delas

nele

nela

neles

nelas

*Examples with verb gostar de* (to like) and pensar em (to think about):**
Gosto dele.	I like him.
Gosto dela.	I like her.
Gosto deles.	I like them.
Gosto delas.	I like her.
Penso nele.	I think about him.
Penso nela.	I think about her.
Penso neles.	I think about them.
Penso nelas.	I think about them.