&gt; Doesn&#x27;t the part parenthesised in commas have a kind of implicit &#x27;is&#x27;?<p>The part between the commas, I think, is called a subjunctive clause. Does it really break the &quot;rules&quot; of E&#x27;? The sentence still contains a verb, so it doesn&#x27;t look like a loop-hole to me.