Aren't がる and たがる the same thing?

Question

In my JLPT practise book, it has two different entries, one to explain `がる` and one to explaining `たがる`. It offeres these example sentences to differentiate them: > うちの子{こ}は新{あたら}しいものを見{み}ると、すぐほしがる。 > > うちの子{こ}は甘{あま}いものを見{み}ると、すぐ食{た}べたがる。 I think they both mean to behave in a way that expresses the feeling described. So, `ほしがる` means to not only hope for, but to act like you hope for it, and as a result, everyone who sees you will know you are hoping. Something like that...　I don't have a pithy way of explaining `がる`. So, if my definition is right, it seems both sentences are explaining essentially the same thing, and the only difference is one is attached to a verb, and the other is attached to a... um... something else. Whatever the grammatical category of `ほしい` is. I'm confused about why the book is going out of its way to explain them separately. Is there a difference in definition between `がる` and `たがる` beyond just how they fit into a sentence grammatically?

Answer 1

たがる and がる is same things. those are different use of saying depending on verbs.

Means that we do not say ほしたがる but we say ほしがる　

we do not say たべがる　we say たべたがる

I do not know why we say this way to be honest with you. We just learned to use this way of saying in this case of verbs you picked up.