Why do you think verb forms are often labelled as 'simple' or indefinite','progressive' or 'continuous','perfect' and 'perfect continuous'?
ANSWER FAST!!!!!!!!!!!!!!!!!!!!! Please!!!!!
Verb forms are usually named or labelled according to their functions.
For instance, Present Perfect Continuous would mean that the action is continuing and is not completed at the present time. Similarly, Simple Perfect would mean the immediate or simple past.