Present Perfect Tense

 The present perfect tense refers to an action or state that occurred at an indefinite time in the past (e.g., we have talked before) or began in the past and continued to the present time (e.g., he has grown impatient over the last hour). This tense is formed by have/has + the past participle.

The construction of this verb tense is straightforward. The first element has or has, depending on the subject the verb is conjugated with. The second element is the past participle of the verb, which is usually formed by adding -ed or -d to the verb’s root (e.g., walked, cleaned, typed, perambulated, jumped, laughed, sautéed). However, English has quite a few verbs with irregular past participles (e.g., done, said, gone, known, won, thought, felt, eaten).

These examples show how the present perfect can describe something that occurred or was the state of things at an unspecified time in the past.
Correct: I have walked on this path before.
Correct: We have eaten the lasagna here.

Keep in mind that you can’t use the present ideally when you are specific about when the action happens.
Correct: I have put away all the laundry.
Incorrect: I have put away all the laundry at 10:00 this morning.

You can use the present perfect to talk about the duration of something that started in the past and is still happening.

Correct: She has had chickenpox since Tuesday.