title: How to add our own sentences and polarities in Vader Sentiment Analysis
body: <p>I am using vader sentiment analysis to analyze covid 19 related tweets. But in the bi grams and tri grams I have seen that words like &quot; positive covid &quot; , &quot;positive cases&quot;, &quot;tested positive&quot;, &quot;test positive&quot; are categorized under positive sentiments in Vader Sentiment Analysis. <a href="https://i.stack.imgur.com/3WIkD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3WIkD.png" alt="enter image description here" /></a>
  Here Green Column is positive sentiments, pink column is negative sentiments and yellow column is neutral sentiments</p>