LEARN ENGLISH GRAMMAR - TENSES - PRESENT PERFECT / PAST PERFECT / FUTURE PERFECT
VIDEO LINK
https://youtube.com/watch?v=33CtWOZdQdA&feature=shares
DEFINITION
Perfect verb tense is used to show an action that is complete and finished, or perfected. This tense is expressed by adding one of the auxiliary verbs — have, has, or had — to the past participle form of the main verb.
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