English - Grammar - Verb Tenses - Present perfect tense - Present Perfect Formation
6 steps: (1) Formula: have/has + PAST PARTICIPLE. 'I have eaten. She has gone.' (2) Has = he/she/it. Have = I/you/we/they. (3) Regular past participles = same as past tense (-ed): 'played, walked, studied.' (4) Irregular past participles (MUST memorize): go→gone, eat→eaten, see→seen, do→done, write→