The present perfect tense is a combination of the present tense and perfect aspect that expresses an event in the past with consequences in the present. For this tense we use auxiliary verbs in their base form in combination with main verbs in their past participle form. This tense is quite easy to learn but harder to use in practice, but nonetheless it's a tense we must know. To properly Tense is a grammatical concept that indicates the time of action or event. Tense provides temporal information and enables us to express actions that have happened in the past, are happening in the present, or will happen in the future. Tenses, in English Grammar, is the form of the verb which shows the time when a specific event has happened noun. 1. (in English) the tense form consisting of the present tense of have with a past participle and noting that the action of the verb was completed prior to the present, as I have finished. 2. a tense of similar construction found in certain other languages. 3. a form in this tense. This means that the correct sentence must use Present Perfect Continuous Tense. However, the 2nd sentence is incorrect because 'having' is a stative verb which cannot be used with a continuous form of tense. 3rd sentence is correct because 'treating' is a dynamic verb which can be used with Present Perfect Continuous Tense. 1st is also correct. Unspecified Time - Life experiences. The present perfect tense is used when the event happened at an unspecified time in the past. We don't say or specify WHEN something happened, the time in the past is not mentioned. This is typically for things we have done in our lives ( life experiences) but without saying exactly when they happened. To form the present perfect tense, we join the present-tense auxiliary verb has or have to the past participle of a verb. This pairing connects the past with the present. Examples. I have (present auxiliary) run (past participle) a marathon. He has (present auxiliary) not run (past participle) a marathon. They have (present auxiliary) been Tense refers to the time frame of the action taking place and is described by using the verb. Present Indefinite Tense or Present Tense can be defined as the action that is done in the present however there is no definite time limit given to it being accomplished. Present indefinite tense can also be used to express true events, near future Let us see some example sentences with formula for present perfect tense when the First Person is Singular: 1) I have studied hard for the exams for the last two months. 2) I have gone to work. 3) I have slept till late this weekend. 4) I have just watched a movie. 5) I have swum since childhood. More Example of Present Progressive Tense. Present Perfect Tense. The present perfect tense is used when one intends to indicate: an action that occurred at a time which is indefinite and has its effect on the subject; or an action that occurred many times and has the possibility to occur in the present/future yiL24.