To Have (Present tense) + Past Participle
Carl has worked a lot this year
In the above example, the verb “has worked” is in the Present Perfect Tense because it indicates a fact or an act in the past. However it also indicates a period of time that has not completely elapsed.
Another use for the Present Perfect that is similar to the previous example, is to express an action that has taken place, but whose time has not been definitely established.
Here is another example of the Present Perfect in English:
Martha has eaten very little.
In this example, the verb “has eaten” is in the Present Perfect to express that Martha ate in the past.
However, it implies that a definite time in which this took place has not been determined.
