How to say "No, not and but" in Indonesian ?

Now, we're gonna learn how to make a negative sentence and a contradiction sentence in Indonesian.

no, not = bukan
but, however = tetapi, tapi, melainkan ( we can use either one of the option )

For example :

1. Ini bukan sepeda, tapi ( tetapi ) motor
    ( This is not a bicycle, but a motorcycle )

2. Apa itu bukan rumah ? or bukannya itu rumah ?
    (  isn't that a house ? )

3. Itu bukan Pak penguin, melainkan Pak akimoto ?
    ( that's not Mr. penguin, but Mr. Akimoto )