referring to common or proper nouns

Question

I read from the other answers that common names such as Juan and proper nouns such as movie are unable to use direct object pronouns.

Example - lo he visto pelicula is wrong but he visto pelicula is correct?
Example - lo he visto a Juan is wrong but he visto a Juan or lo he visto is correct?

how about el pelicula de Pedro lo he visto

or

he visto el pelicula de Pedro?

Thanks in advance

Accepted Answer

Hola Ashlyn
You can start with the direct object first, and then repeat the pronoun, for example, for:
He visto la película de Pedro. 
I watched Pedro's film.
you can also say:
La película de Pedro la he visto. 
With a proper noun you can also do this:
Vi a Pedro ayer.
I saw Pedro yesterday.
or 
A Pedro lo vi ayer. 
This is possible as long as you start the sentence with the object.
I hope it clarifies it.
Saludos
Inma