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PRESENT PERFECT image, Sentences from the video, auxiliary, EXAPLES
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PRESENT PERFECT 
What are verb tenses?
Verb tenses show if an action takes place in the past, present, or future.
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Regular verbs
Irregular verbs
With irregular verbs, the past participle changes into a different form.
we don't use -ed.
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With regular verbs, we use the verb + -ed
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Sentences from the video
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affirmative
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Dear friend, i've been trying to start over again
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auxiliary
HAVE / HAS
SUBJECT
people,animal,
things,places,etc.
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EXAPLES
-I have finished my homework.
-She has worked in this office for 12 years.
-My friends have seen that movie.