Sentence:  It will be seen that where the scope is similar , the Athabascan ratios come out somewhat higher ( as indeed they ought to with a total ratio of 2.8 as against 3.5 or 4 : 5 ) except for verbs , where alone the Athabascan ratio <WSD>is</WSD> lower . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)