PRESENT PERFECT AND PAST SIMPLE

Present Perfect from monira21

Present Perfect Tense from IES Rosario de Acuña

 

Simple past vs. present perfect tense from Patricia Mellino

Present Perfect with Just, Yet and Already.

You can practise the differences between the PRESENT PERFECT and the PAST SIMPLE doing the following exercises.
Present perfect and Past Simple 1
Present Perfect and Past Simple 2
Present Perfect or Past Simple?

SONG:
What can I do? by The Corrs.