Have/has lost.
The present perfect of "lose" is "have lost." For example, "I have lost my keys."
Have/has lost is the present perfect tense of lose.I have lostWe have lostYou have lostHe/she has lostThey have lost
Have/has lost is the present perfect tense of lose.I have lostWe have lostYou have lostHe/she has lostThey have lost
Perfect tenses of loss:"Loss" is a noun and so doesn't have any tenses. Only verbs have tenses.Perfect tenses of loose:Present perfect - have/has loosed.Present perfect continuous - have/has been loosing.Past perfect - had loosed.Past perfect continuous - had been loosing.Future perfect - will have loosed.Future perfect continuous - will have been loosing.Perfect tenses of lose:Present perfect - have/has lost.Present perfect continuous - have/has been losing.Past perfect - had lost.Past perfect continuous - had been losing.Future perfect - will have lost.Future perfect continuous - will have been losing.
The present perfect of follow is has/have followed.
The present perfect form of "present" is "have/has presented."
The simple past and past participle forms are both lost.I lose things easily. (simple present)I have lost my book. (present perfect)I lost my shoe. (simple past)
I have lost my bank card before. This isn't the first time it has happened.
The present perfect tense is Have/Has Hidden.
The present perfect tense is has/have existed.
have/has planned (PRESENT PERFECT)
The present perfect is 'I have sung'