<p>had run is proper.</p>
<p>If you meant had ran, it is not proper because it is not in the correct tense. While intuitively it may sound right to your ear, it does not abide by English grammar rules.</p>
<p>runs, run, ran:</p>
<p>he runs everyday (simple present)</p>
<p>he ran to the stadium (simple past) </p>
<p>he had run the entire distance (past perfect)</p>
<p>If it helps, memorizing some tricky verb tenses will help your writing score a lot. </p>
<p>This is basically all I used to work on writing and it works amazingly</p>
<p><a href=“SparkNotes: Today's Most Popular Study Guides”>SparkNotes: Today's Most Popular Study Guides;
<p>Scroll down to the chart with all the tricky verb tenses that the SAT tests you on, and if you want to memorize them.</p>
<p>Basically if it has some form of the verb “to have” before the primary verb, then you have to use the past participle from the chart.</p>