First of all, I hope you're using the desktop (downloaded Windows) editor. If not, if you're using the online editor, then it's much harder to do what you want.
In the desktop Quest editor:
- Click on Filter in the bottom left, and then choose Show Library Elements. This will make all the internal core elements show up.
- Under Commands in the left pane, look for the "lookat" command. Select it.
- Click the Copy button in the top right of the window. This will put a copy of the command into your game file.
- Change the pattern to be:
look at #object#; x #object#; examine #object#; exam #object#; ex #object#; look #object#
That is the current pattern with "; look #object#" tacked on the end.
That should do it.
I believe "talk XXX" should already work, based on the verb templates I see. This is what's in the core English file:
<verbtemplate name="speakto">speak to</verbtemplate>
<verbtemplate name="speakto">speak</verbtemplate>
<verbtemplate name="speakto">talk to</verbtemplate>
<verbtemplate name="speakto">talk</verbtemplate>
It supports all four of those variants for the "speakto" verb.