Present Perfect for 4th ESO

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Are you tired of having problems with Present Perfect?

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http://www.isabelperez.com/happy/tenses/pres_perfect.htm

http://www.isabelperez.com/happy/tenses/exercises/present_perfect_2.htm

http://www.agendaweb.org/verb/present_perfect.html

http://www.go4english.com/vg/read.php?unitid=1000

http://www.geocities.com/suzkeadie/vpresperfsimvpastsim.html

We hope you'll learn a lot!!!