Can I use CLI v4 for Ionic 3 projects?

Hi, just a quick question.

I have a couple of Ionic 3 projects, that I am not quite ready to migrate over to Ionic 4 yet. At the same time, I want to start playing with Ionic 4 beta. I assume to do this I need to update the CLI to version 4.

My question is, if I do this, can I continue to use CLI v4, to build generate etc with my Ionic 3 projects?

For example, can I still generate a provider, and have it located in the providers folder as opposed to the new structure which would be under services? (just to be constant until I can migrate the whole project to the new structure)

Thanks in advance!