Is it possible to have a 'toggle' button to turn off a specific Input?

[reWASDer]

But if i do do not inherit, and i hold my shift 2 key, then will it still run because W is bound to forward on controlelr even tho Im still holding W down too?

The character will run in the following case: you press W and while you are still hold it, you go to the Shift mode. Until you release the key, it should be running.