1a. incorrect
1b. incorrect
2. before
3. No, you only need a personal a when the object is a person.
Hope this helps love!
<span>The correct answer is A. In Spanish, the present-tense verbs for 'to compete' are considered to be stem-changing verbs because sometimes, when 'e' is stressed, it is then changed to 'ie'. A stem-changing verb is a verb in which the stem changes predictably when the word is conjugated.</span>
