【文法】Suki na tabemono wa ~

We can explain my favorite and not favorite food.
Watashi wa suika ga suki desu. Budoo wa suki janai desu
Particle [ga] is positive comment and particle [wa] is kind of negative comment to use something you compere with.

「くだものは　なにが　すきですか。」
「すいかが　すきです。」「ぶどうは　すきじゃないです」

Sydney Japanese Language School, Nihongo Juku gives you a tip for your conversation in Japanese