After someone thanks you, the correct phrase is “you’re welcome,” not “you’re welcomed.” In the previous example, welcome is used as an adjective. Welcome can also serve as a verb (We welcome the summer!) or as an interjection (Welcome!), usually stated when greeting someone.
Welcome as an adjective
As an adjective, welcome means wanted, appreciated, or pleasing.
In the phrase “you’re welcome,” which is what you say when someone thanks you, “welcome” is an adjective.
Welcome as a verb
When used as a verb, welcome keeps the same meaning; to welcome something means to greet it or to receive or accept it with pleasure.
Welcome as an interjection
Interjections are words we use to express surprise, anger, or other types of emotions. Welcome can be interjection if you use it to greet a guest. You use it the same way you’d use “hello.” The difference is that “hello” is neutral and “welcome” is warm and inviting.
You are more than welcome
Sometimes, if you want to show someone that they are really welcome, you might use the phrase “you are more than welcome” or “you are very welcome.” These phrases follow the same rules described above—the correct form is welcome (not welcomed).