1. Subject pronoun or object pronoun?

2. SUBJECT PRONOUN OBJECT PRONOUN
The man who lived next The man who we met
door was very friendly. was very friendly.
subject
object subject
“who” is an obligatory
element “who” is an optional
element (it is the object of
the subordinate clause)

3. SUBJECT PRONOUN OBJECT PRONOUN
This is the bank which This is the bank which
was robbed yesterday. they prefer
object
subject subject
“which” is an obligatory “which” can be omitted
element because it is the object of
the subordinate clause

4. SUBJECT PRONOUN OBJECT PRONOUN
They are playing a song that They are playing a song that
sounds good. we like.
subject subject object
“that” is an obligatory element “that” is an optional element
(it can be inserted or not)

5. The relative pronouns who, which and that
can be omitted when they function as the
object of the subordinate clause.
Note: the relative pronouns where, whose and when cannot
be omitted in a clause.
Analía V. Gozzarino