PRESENT PERFECT
THE PRESENT PERFECT IS FORMED BY COMBINING THE AUXILIARY VERB "HAS" OR "HAVE" WITH THE PAST PARTICIPLE.
THE PRESENT PERFECT IS A COMPOUND TENSE, TWO VERBS ARE REQUIRED: THE MAIN VERB AND THE AUXILIARY VERB.
- I have studied (main verb: studied; auxiliary verb: have)
- He has written a letler to María (main verb: written; auxiliary verb: has)
- We have been stranded for six days (main verb: been; auxiliary verb: have)
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