Here is the form and usage for the Present Perfect in English:
PAST PARTICIPLES
There are two forms of verbs, regular and irregular.
You know from studying the Past Simple that regular verbs in the past end in ‘ed’. And you know that there are a lot of verbs that are irregular.
It is the same with Past Participles.
The trick to memorizing the irregulars is to review them briefly, but often.
