1. What are the forms and uses of Present Perfect Simple Tense?
2. What are the forms and uses of Present Perfect Continuous Tense?
Present perfect continuous and simple
Cambridge University Press
978-0-521-18939-2 – English Grammar in Use
In this video lesson you will find easy and clear explanations of when and how to use the present perfect continuous (I have been doing) and when to use the present perfect (I have done).
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You can find evetything you need about this grammar section.
usage of question form
time expression, etc.
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