In grammar, present perfect tense is a combination of the present tense and the perfect aspect. To create the present perfect tense, combine a present-tense phrase with the past participle of the verb that can either be regular or irregular.
English speakers use the present perfect tense to express an action that has occurred in the past but still has present consequences. It is not permissible to use it to reveal the exact time at which the event occurred. It is also not allowable to use it alongside time-sensitive expressions such as yesterday, last year, or today. Present perfect tense defines an experience that occurred over a period of time, accomplishments, an uncompleted action or multiple actions that occurred at separate times. For example, “The snow has not stopped” uses the present perfect tense. The phrase “Has not stopped” represents an action that is incomplete.