Verbs and Present Perfect Tense

Which of the following sentences uses the present perfect correctly?

O Yo ha dicho todo lo que voy a decir.
O Yo he dicho todo lo que voy a decir.
Yo hemos decido todo lo que voy a decir.
Yo has dicido todo lo que voy a decir.

Answer:

A. Yo ha dicho todo lo que voy a decir.

The sentence that uses the present perfect of the verb correctly is A. Yo ha dicho todo lo que voy a decir.

What is a verb?

It should be noted that a verb simply means an action word. It's used to show that an action has taken place.

In this case, the sentence that uses the present perfect of the verb correctly is "Yo ha dicho todo lo que voy a decir".