Answer:
In order to answer this question, we need to understand 2 things: <em>which are the principal parts of a verb</em>, and <em>what is the stem of a verb</em>.
Explanation:
Firstly, there are <u>4 principal parts</u> in latin verbs:
1. the present, active, first person, singular <em>(Example: </em><em>amo </em><em>– love)
</em>
2. the present active infinitive <em>(Example: </em><em>amare </em><em>– to love)
</em>
3. the perfect, active, first person, singular (<em>Example: </em><em>amavi </em><em>– have loved)
</em>
4. the past participle, singular <em>(Example: </em><em>amatus </em><em>- loved)
</em>
Secondly, <u>the stem of a verb</u> is the one left once you take away the “–ar”, “-er”, or “–ir” ending.
Now, we can conclude that <u>the first principal part</u> gives you the present stem of the verb.