The present perfect tense helps in highlighting the relationship that exists between the present tense and the past tense. It is formed by adding 'have' or 'has' with the third form of the verb. The time in which the action had taken place is sometimes in the past and has continued in the present times. It also specifies the action that has occurred at a time that has not been completed. In the given sentence, 'have ever experienced' is the present perfect tense.