Present Perfect: Experience & Results

We make the present perfect with the helping verb have or has plus the past participle of the main verb (I/you/we/they have, but he/she/it has): I have seen, she has gone. We use it to talk about life experiences without saying exactly when (Have you ever been to London?), and about recent actions whose result we can see now (I have lost my keys, so I can't open the door). The adverbs ever and never go before the past participle to talk about experience: 'Have you ever eaten sushi?' and 'I have never eaten sushi.' We use just for something that happened a very short time ago (She has just left) and already for something finished sooner than expected, both placed between have/has and the participle (I have already finished). The word yet is used in questions and negatives and goes at the end of the sentence: 'Have you finished yet?' and 'I haven't finished yet.' Remember that the past participle of regular verbs ends in -ed (work → worked), but many common verbs are irregular and must be learned (go → gone, see → seen, eat → eaten). For example: 'I have already done my homework, so I am free now.'