andere vraag over 'er'

[Iouri]

I like it. Ik houd ervan.
Can I say
Ik houd van het. Or this is a mistake

bedankt

[Quetzal]

No, you can't. Needs to be "ervan".

Also, "ik hou" is far more common than "ik houd" - "houd" is of course correct in principle, but you're not likely to hear anyone say it, or see anyone write it.

[Iouri]

Thank you very much

[Iouri]

What about

I see it. Ik zie er(het)
I do it. - Ik doe er(het)
I find it. - Ik vind er(het)
etc

which one is correct?

[Bert]

What about

I see it. - Ik zie het.
I do it. - Ik doe het.
I find it. - Ik vind het.
etc

which one is correct?

What do you think of it? - Wat denk/vind je ervan?
Do you see the tree? I see it. - Zie je de boom? Ik zie hem.
Do you see the house? I see it. - Zie je het huis? Ik zie het.

[Iouri]

So I assume that when the prefix like van, op, etc is used, we use er, otherwise we use het.
Is my assumption correct?

Thank you

[Bert]

Here you can find a detailed explanation:
http://www.dutchgrammar.com/en/?n=Pronouns.Ps09

[Iouri]

Here we go.

Thank you very much