Present Perfect Practice

Present Perfect

Videos:

https://www.youtube.com/watch?v=vLIJ9GfpuFc

https://www.youtube.com/watch?v=aVo83K-GwHc

https://www.youtube.com/watch?v=12wpL4CII6k

Since/for

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/upperf1.htm

http://www.englisch-hilfen.de/en/exercises/confusing_words/since_for.htm

http://perso.ya.com/mjandres/archivos/since&for.htm

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-8831.php

http://www.englishexercises.net/yyforsince.html

have/has

http://www.agendaweb.org/exercises/verbs/present-perfect-2

https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?03

http://www.agendaweb.org/exercises/verbs/present-perfect

forms

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/upperf.htm

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/prperf.htm

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/prperf1.htm

http://www.nspeak.com/newbasic/grammatica/presperfect.htm