All that is needed to participate is access to an Internet connection
I don't know why I am confused when I see this structure. I see the part " all that is needed to do something" is subject but seeing two linking verbs like is in the same sentence makes me feel that it sounds unnatural. Is there any alternative ways to rephrase the sentence ?
I would expect to be written the sentence as follows:
All that (which is) needed to participate is access to an Internet connection.
Because it is grammatically correct to say :
All that he wants is another toy.
All you need to participate is access to an Internet connection.