Afrikaans Problems

If a clause started like this
....Who would have to do
It'll be sou moes doen

But which verb shoule be put at the end of the sentence?

I mean,

wat....sou moes doen?
wat sou....moes doen?


2,
I wanna say"Only...... kan we ...",what should I do?

I hope this helps, but my Afrikaans is very rusty

Usually word order is:

Nominative
First Verb
Time aspect
Object
Manner
Place
Second Verb
Infinitive Verb

Perhaps a little more information in your questions might help shed some light?