*Present Perfect:
http://www.learnenglish.org.uk/CET/flashactivities/learnenglish-central-grammar-present-perfect-form.html
* Present Perfect: for / since:
http://www.usingenglish.com/handouts/235.html
http://www.usingenglish.com/handouts/14.html
* Present Perfect / Past Simple:
http://www.english-grammar-lessons.com/presentperfectorpastsimple/exercise1.html
http://www.english-grammar-lessons.com/presentperfectorpastsimple/exercise2.html
** Present Perfect / Past Simple:
http://www.english-grammar-lessons.com/presentperfectorpastsimple/exercise4.html
http://a4esl.org/q/f/z/zz29bms.htm
* Present Perfect / Past Simple and for / since / ago:
http://www.english-grammar-lessons.com/presentperfectorpastsimple/exercise3.html
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5587.php
Thursday, April 30, 2009
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