As an example, TextFugu uses the particles [は] and [が] in this way:
Q. いぬ が すき ですか?
A. はい、いぬ は すき です。
It then states this reason, “In the question, we used が because we identified the thing we’re asking about (dogs). Because dogs have already been identified, you can answer using は, which puts the emphasis and importance on whether or not you like them (i.e. what comes after は).
However, in a later example, [は] and [が] are used this way:
Q. わたしのくるまはすきですか?
A. いいえ、あなたのくるまがきらいです
After learning about the particles, I’m confused about the use of [が] rather than [は] in the answer portion, as the “topic” has already been identified (i.e. the person’s car), thus, what should be emphasized is the feeling towards the car which would entail the use of [は], right? Or am I wrong?
So, can anyone explain to me the use of [が] over [は] in the later example? Is it that you can use either one? Thanks.