Move tween part with input??

Ok, so I want to smoothly move a part when a button is being held... cool right? So like say I hold the Y key and as I hold the Y key the part moves up and when I let go of it then the part stops moving. And if I hold let's say the G key which moves it into a direction other than up then it combines with the y input.. This sounds super basic but I don't know what I'm doing yet please don't make fun of me I don't know how to use my brain