Kilroylentless Konjugular

O 
O!
Oh!
Oy!
OK.
Koi!
Roy!
Okay.
K’roy?
Killroy
Killjoy
Kill goy!
Kill Roy?
Kill droid!
Kill’d: Roy
Skill’d Roy.
Here, Kilroy!
Kilroy’s here.
Kilroy? Here?
Kilroy is here.
Kilroy’s here?
Kilroy be here.
Kilroy...? Here.
Ljmspz xbt ifsf.
Kilroy was here.
Hilroy was kere.
Kilroy was here.
Yorlik saw ereh. 
Here was Kilroy.
Kilroys were here.
He-e-ere’s Kilroy!
’Twas Kilroy here.
Kilroy’s been here.
Kilroy will be here.
Kilroy may be here.
Killroy shall be here.
Kilroy must be here.
Kilroy could be here.
Kilroy might be here.
Kilroy has been here.
Kilroy was kill'd, Roy.
If Kilroy were here…
Was not Kilroy here?
Kilroy had been here.
Kilroy was to be here.
Kilroy should be here.
Was Kilroy ever here?
Were only Kilroy here…
Ilroykay uzway eerhay.
Kill Roy. (But not here.)
If only Kilroy were here.
There once was a Kilroy...
Kilroy is about to be here.
Kilroy will have been here.
Kilroy is to have been here.
Kilroy may have been here.
Kilroy shall have been here.
Would that Kilroy were here.
Kilroy could have been here.
Kilroy might have been here.
Kilroy would have been here.
Would that Kilroy’d been here.
Kilroy was to have been here.
Kilroy should have been here.
Kilroy ought to have been here.
Kilroy may be about to be here.
Would that Kilroy could be here.
Would that Kilroy had been here.
Kilroy is about to have been here.
Kilroy will have to have been here.
Will Kilroy have to have been here?
Kilroy should have to have been here.
Kilroy will be about to have been here.
Kilroy may be about to have been here.
Kilroy shall be about to have been here.
Would that Kilroy could have been here.
Kilroy coulda woulda shoulda been here.
Kilroy should be about to have been here.  
Kilroy should have been about to be here.
Should Kilroy be about to have been here?
Kilroy would have been about to be here but...
Kilroy should have been about to have been here.
Kilroy shall have to have been about to have been here.
Was Kilroy not said to have been about to have been here?
Would that Kilroy should have to have been about to have been here…

                      What’s that? You say Kilroy wasn't here…?