Click on the link and you’ll find exercices and tests to practice the Past Simple and Present Perfect.
Use
In British English, the use of Simple Past and Present Perfect is quite strict. As soon as a time expression in the past is given, you have to use Simple Past. If there are no signal words, you must decide if we just talk about an action in the past or if its consequence in the present is important.
http://www.ego4u.com/en/cram-up/grammar/simpas-preper ( theory to study and exercices )
