[tlhIngan Hol] to be sentences with {-bogh} and the {-'e'}

Read: {Qun 'oHbe'bogh vIghro''e' wIghajnISbe'} we don't need to have a cat which isn't a god What is the role of the {-'e'} on the {vIghro'} ? To give the "as for the.." meaning ? To mark the topic of the sentence ? To give emphasis to the {vIghro'} word ? Or all of the above ? ~ bara'qa'