@misc{10818/33360,
year = {2018},
month = {6},
url = {http://hdl.handle.net/10818/33360},
abstract = {By the end of this lesson the student will be able to use present perfect in order to indicate a link between the present and the past.},
publisher = {Universidad de La Sabana},
keywords = {Present perfect},
keywords = {Grammar},
keywords = {Past situations},
title = {Present Perfect},
author = {Lozano, Sergio},
}