英文 英文 英文 形容詞英文 英文 英文 形容詞

food is tasty = yes, it is an adjective
I am healthy = adj.
He is naughty = adj.
The road is dirty = adj.

We have to learn it by heart and remember them when we come across these adjectives.

Tasty is absolutely an adjective. These kind of words which end with "ty" always have "three levels" to describe the level of the meaning . For example, the first level of tasty is tasty, then is tastier (more tasty) and the tastiest (most tastiest)
i don't know why those word have ty for the ending. I guess it is just the way it is
-ty is a suffix, forming nous denoting quality or condition such as beauty, royalty

Similar words.
nasty
pretty
naughty