Only the future marker -ko- is preradical; all other TAM markers are postradical. Apart from future -ko-, another preradical TA marker is -zô-, marking Present Progressive, but this is the contracted variant of a periphrastic form.
Nazalí kolámba sósó
Na-zal-í ko-lámb-a sósó
1SG-be-PRS.PRF INF-cook-FV chicken
'I am preparing chicken'
=
Nazôlámba sósó
Na-zô-lámb-a sósó
1SG-PRS.PROG-cook-FV chicken
'I’m preparing chicken'
Source: nd
Source: nd