Breakdown of Eu considero-o incompetente, porque ele não sabe trabalhar.
eu
I
não
not / no
ele
he
trabalhar
to work
Questions & Answers about Eu considero-o incompetente, porque ele não sabe trabalhar.
What is the grammar role of incompetente here, and does it agree with the subject or the object?
It describes the direct object -o (him), not the subject eu (I). This is known as an object complement (predicativo do complemento direto). Because it is an adjective, it must agree with the object it modifies. If the object were feminine plural, like -as (them), the adjective would change to match, becoming considero-as incompetentes.
Why do we say considero-o instead of o considero?
Why doesn't the sentence say não sabe como trabalhar for 'doesn't know how to work'?
Could we express this same idea using a subordinate clause?