PRESENT PERFECT/SIMPLE PAST
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Present perfect
FORM
[has/have + past participle]
Examples:
You have seen that movie many times.
Have you seen that movie many times?
You have not seen that movie many times.
Simple past
FORM
[VERB+ed] or irregular verbs
Examples:
You called Debbie.
Did you call Debbie?
You did not call Debbie.
