[AmgedIsmail]

So if I mentioned the subject here i should use "ni" instead of "e"?
And if I mentioned the subject in an object sentence I should use "o" instead of "ga"..

OK what about this?

Where did you go yesterday?
Can I say
anata wa kinoo doko e ikimashitaka.
あなたはきのおどこえいきましたか。

Or?
anata wa kinoo doko ni ikimashitaka.
あなたはきのおどこにいきましたか。