"Do you like that duck?"
Translation:Você gosta daquele pato?
No, if you know the duck is female you could say "daquela pata", but you have to change the word "pato" to the feminine "pata." This can apply to all "masculine" animals, e.g. daquela cachorra, daquela golfinha, etc etc. I am, however, unsure of is this works exactly for feminine animals that you know are males... anyone that can chime in on that would be appreciated!
The feminine animals I'm thinking of do not (as far as I know) turn masculine, unless there is a clear word for the masculine version of the animal. We use "macho" and "fêmea" when referring to the gender of animals and of electronic plugs.
The cow -- A vaca (masc=o boi, o touro);
The eagle -- A águia (masc= a águia macho?);
The seal -- A foca (masc=a foca macho?);
The snake -- A cobra (masc=a cobra).
I had never thought of it before! I am going to start referring to male eagle as "o águio". I like specifics.
I am trying to think of a good way to explain, I might have to get back to you. But what comes to mind is that aquilo is not followed by a noun, and always refers to a thing or thought. It's like it has an "it" in it. All apply to things that are not close to the people involved in the conversation. The people involved be remembering, pointing at, or talking about something.
Eu gosto daquele = I like that one. (can refer to thing or person, I'm assuming the person is pointing or referring directly to something or someone);
Eu gosto daquele carro = I like that car. (insert noun of your preference);
Eu gosto daquilo = I like that thing (thing over there, thing I am talking about--cannot refer to a person... it really refers to "thing"). Best translation that comes to mind, in form of normal English expression: I sure like that! -- but as I said, in English you can add a noun to the end of that sentence, in Portuguese, if you are using "aquilo", you cannot.
You can't say "eu gosto daquilo carro". I know it's not a great explanation, but I hope it will help you out more than get in the way. =D