<h2>Right answer: Acabo de trabajar mucho
</h2>
The verb acabar (to finish) means to complete an activity, to accomplish it to the end. Conjugated in <u>present tense</u> (indicative) with the <u>1st person in singular</u> yo (I) is acabo ( I finished).
Now, this verb is also used as a verbal periphrasis or verbal phrase to mean that somebody has just done or finished something. This is with the rule below, as follows:
<h2>Subject + acabar (in its many conjugations) + de + main verb in infinitive + complement
</h2>
Note in spanish sentences it is not always necessary the subject.
In the case of the sentence:
(Yo) Trabajo mucho (I work a lot)
The verb trabajar (to work) is in <u>present tense</u> with the <u>1st person in singular.
</u>
So, if we change this sentence to the verbal periphrasis form shown above, taking into account the verbal tense we have:
<h2>
</h2><h2>(Yo) <u>Acabo</u> de trabajar mucho
</h2>
I just worked a lot
